Imagine Wireless PHX · Rev 1 Baseline
Venue Network Intelligence Report · Rev 1 · First issue

Network baseline for Phoenix Sky Harbor across Terminals 3 and 4

The newest passenger building at PHX is the weakest place measured, for every carrier. Over the footprint of the eight-gate concourse that opened in 2022 (Gates D11 to D18), the healthy tile shares are T-Mobile 16%, Verizon 9%, AT&T 57%. Away from the buildings the three carriers are close together: the gate-area 5G medians span 1.9 dB and all sit above the healthy line. The City of Phoenix is building an airport-wide cellular distributed antenna system through spring 2027, so this window is a baseline.

110
Gate points measured · Concourse A 28 · B 30 · C 16 · D 16 · E 10 · F 10 · of 117 published gates
27,206
Unique on-airport tile centroids · 50,313 carrier-tile observations of 111,616 exported · 26,948 usage tiles · 117 mapped venue points (OpenStreetMap, pinned 2026-09-16)
0 / 330
Gate-carrier pairs below the critical line (−110 dBm)
46.5%
Wi-Fi share of observed MB on tiles in a concourse zone (n=14,851) · 47.1% over the whole clip (n=26,948) · not attributable to any one network
Prepared by the Imagine Wireless Network Intelligence Platform · Powered by Ookla
Data window 2025-09-01 to 2026-08-31 · Issued 2026-09-16 (rev 1) · Freshness 16 days at issue
Prepared for City of Phoenix Aviation Department stakeholder review
Confidential
Section 1

Executive readout

Weakest building · baseline purpose

The newest passenger building at PHX is the weakest place measured, for every carrier. Over the footprint of the eight-gate concourse that opened in 2022 (Gates D11 to D18), the 5G medians are T-Mobile −102.0 dBm, Verizon −106.0 dBm, AT&T −94.0 dBm, and the healthy tile shares are T-Mobile 16%, Verizon 9%, AT&T 57%. Two of the three carriers fail more than four fifths of the tiles there.

Across the two terminal footprints the picture is better and it is not uniform: over the Terminal 3 footprint T-Mobile leads (T-Mobile 92%, Verizon 82%, AT&T 69% healthy), and over the Terminal 4 footprint Verizon leads (T-Mobile 77%, Verizon 84%, AT&T 74%). Away from the buildings the three carriers are close together: the gate-area 5G medians span 1.9 dB (T-Mobile −89.7, Verizon −90.2, AT&T −91.5 dBm, n=110 gate points), all above the −95.0 dBm healthy line, and no gate point is weak on all three carriers. It measures 110 gate points, 117 venue points, 27,206 unique tiles (50,313 carrier-tile observations) and 26,948 usage tiles over 12 months.

−89.7 dBm
T-Mobile gate-area 5G median · healthy at 81 of 110 gate points (73.6%) · 10 within 1 dB of the line · at risk at 29 · critical at 0
−90.2 dBm
Verizon gate-area 5G median · healthy at 93 of 110 gate points (84.5%) · 6 within 1 dB of the line · at risk at 17 · critical at 0
−91.5 dBm
AT&T gate-area 5G median · healthy at 88 of 110 gate points (80.0%) · 16 within 1 dB of the line · at risk at 22 · critical at 0
What a gate-area number is at PHX

Every gate figure on this page is an aggregate of the tiles within 80 m of a gate point, and at PHX that circle reaches apron and roadway as much as building. Across the 110 gate points, a median of 21.6% of the tile centroids inside the join fall within a building footprint, and the highest at any gate is 37% (per concourse: A 20.6%, B 22.9%, C 16.5%, D 20.1%, E 21.6%, F 26.6%). A gate-area figure is therefore mostly an outdoor ramp reading. Gate-area and zone results in this report are reported as counts and shares and are never called a lead; the report names a leader only over a building footprint (section 4.7).

External benchmark, engaged with up front

Ookla's worldwide airport internet performance report for the first quarter of 2025 named PHX one of only three airports out of 48 that met the Federal Communications Commission benchmark of 100 Mbps download and 20 Mbps upload on both in-airport Wi-Fi and mobile not independently verified. That is not in tension with this report. It measures throughput on the public networks; this report measures signal level and signal quality and carries no throughput or latency field at all (section 16). A venue can clear a download benchmark and still hold the gaps measured here, because a strong signal can be congested and a weak signal can be fast when few devices share it. The two readings answer different questions, and the one this report answers is where the radio conditions are weakest and which buildings they sit in.

Provenance legend: measured values compute from the Ookla exports at build time. Facts marked "held" come from a source document pinned in this build and checksummed in the verification bundle. Facts marked "not independently verified" are public record that this build cites without holding a copy. Facts marked "Imagine knowledge graph" come from the pinned Imagine knowledge-graph snapshot. Section 16 defines every threshold and basis.

Phoenix Sky Harbor International Airport is operated by the City of Phoenix Aviation Department held. Two terminals are in service: Terminal 3, with two concourses, the North Concourse at gates E1 to E10 and the South Concourse at gates F1 to F15, after a 590 million dollar modernization completed in 2020, all gates common use; and Terminal 4, with eight concourses on Level 3, four on the north side carrying the A and B gates and four on the south side carrying the C and D gates. The official Level 3 map, revision October 2, 2022, assigns gates A1 to A30 and B1 to B22 to American Airlines, gates B23 to B28 to international carriers, and gates C1 to C19 and D1 to D8 to Southwest Airlines; gates D11 to D18 in the 2022 concourse are Southwest. Airlines that began service after that map, including China Airlines and STARLUX Airlines, are not assigned to a concourse in any held source. Terminal 2 closed on February 4, 2020 after 58 years of service and its site now holds aircraft parking positions, so two terminals carried the whole window all held.

T-Mobile

Tied with Verizon at the gate-area 5G median, healthy at the fewest gate points of the three, and the weakest LTE layer. T-Mobile's venue 5G gate median is −89.7 dBm, 0.5 dB from Verizon's and inside the 1 dB noise floor, so the two are reported as tied. It holds healthy 5G reference signal received power (RSRP) at 81 of 110 gates (73.6%; 10 gates within 1 dB of the line), the fewest of the three, with 29 gates at risk and 0 critical. It holds the strongest gate-area 5G reading at 46 of 110 gates (Concourse A 9 of 28, Concourse B 25 of 30, Concourse C 6 of 16, Concourse D 0 of 16, Concourse E 0 of 10, Concourse F 6 of 10, counts), concentrated in Concourse B, and reports 5G on 92% of its on-airport tiles, a share that mixes deployment with the panel's handset mix (section 16) and is not compared across carriers here. Its signal-quality median is +10.2 dB (61 of 110 gates healthy), the lowest of the three. Its lowest zone is Terminal 4 Concourse D (44% of tiles healthy) and over the Gates D11 to D18 footprint it is healthy on 16% of tiles. Its LTE layer is the weakest of the three (gate median −93.8 dBm, 60 of 110 gates healthy).

Verizon

Tied with T-Mobile at the gate-area 5G median, healthy at the most gate points, and holding the highest 5G signal-quality median on a C-band-dominant footprint. Verizon's 5G gate median is −90.2 dBm. It is healthy at 93 of 110 gates (84.5%; 6 gates within 1 dB of the line), the most of the three, with 17 gates at risk and 0 critical, and its 5G signal-quality median of +16.2 dB (103 of 110 gate points healthy) is the highest of the three, read with the band confound below. It holds the strongest gate-area 5G reading at 29 of 110 gates and reports 5G on 80% of its tiles. Its LTE layer is healthy (gate median −89.5 dBm, 86 of 110 gates). Its lowest zone is Terminal 4 Concourse D (54% healthy), and over the Gates D11 to D18 footprint it is healthy on 9% of tiles, the lowest reading in the building-masked table. Verizon is the weakest carrier at 33 of 110 ranked asymmetry gates.

AT&T

Third at the gate-area 5G median by 1.4 dB, holding the strongest LTE reading at 64 of 110 gate points, and the least weak of the three over the newest Terminal 4 building's footprint, which is the weakest building measured. AT&T's 5G gate median is −91.5 dBm, 1.4 dB behind Verizon and 1.9 dB behind T-Mobile, above the healthy line. 88 of 110 gates (80.0%; 16 gates within 1 dB of the line) are healthy, 22 at risk, 0 critical. It reports 5G on 48% of its on-airport tiles, the smallest footprint; the other 52% carry LTE only. Its LTE layer is the strongest of the three: best-LTE at 64 of 110 gates, gate median −88.6 dBm, 102 of 110 gates healthy. Its 5G signal-quality median is +13.8 dB (98 of 110 gates healthy). AT&T holds the strongest gate-area 5G reading by count in Concourse A, Concourse C, Concourse D and Concourse E (Concourse A 10 of 28, Concourse C 7 of 16, Concourse D 11 of 16, Concourse E 6 of 10, counts), and over the Gates D11 to D18 footprint it is healthy on 57% of tiles against T-Mobile 16% and Verizon 9%. Its lowest zone is Terminal 3 Concourse F (South) (57% healthy). AT&T is the weakest carrier at 49 of 110 ranked asymmetry gates.

Per terminal

Terminal 4 gate medians: T-Mobile −89.4, Verizon −90.3, AT&T −91.5 dBm (n=90 gates); healthy 5G at T-Mobile 61 of 90 gates (68%), Verizon 75 of 90 gates (83%), AT&T 73 of 90 gates (81%). Terminal 3 gate medians: T-Mobile −90.2, Verizon −89.2, AT&T −91.8 dBm (n=20 gates, below the 30-gate floor, counts only); healthy 5G at T-Mobile 20 of 20 gates, Verizon 18 of 20 gates, AT&T 15 of 20 gates (counts).

A different carrier leads each building footprint

Over the OpenStreetMap building footprints, which is the only basis on which this report names a leader: Terminal 3 T-Mobile leads (T-Mobile 92%, Verizon 82%, AT&T 69% of tiles healthy). Terminal 4 Verizon leads (T-Mobile 77%, Verizon 84%, AT&T 74%). Gates D11 to D18, the 2022 eighth concourse occupied by Southwest Airlines, AT&T leads (T-Mobile 16%, Verizon 9%, AT&T 57%). Every ranked cell clears the 30-tile floor. The leader changes from building to building, which is the pattern a phased in-building program produces and equally the pattern macro-site geometry can produce; section 4.7 carries the full table and section 13 asks which it is.

Photo · Terminal 4 gate hold room, August 2023Wikimedia Commons
Interior photograph of a Terminal 4 gate hold room at Phoenix Sky Harbor in August 2023, with rows of seating, windows onto the apron, and the concourse ceiling above

Terminal 4 gate hold room, August 2023. Photo: FASTILY, CC BY-SA 4.0, via Wikimedia Commons. Illustrative, resized only.

How the order holds

Gate-median order: T-Mobile and Verizon tied, then AT&T. The T-Mobile-to-Verizon margin is 0.5 dB, under the 1 dB noise floor set in section 16, so this report never ranks one above the other on that figure; T-Mobile is listed first only because its median is numerically higher. AT&T trails Verizon by 1.4 dB, at or above the floor, so it is ranked third on the gate median. On the healthy-gate count the order is Verizon, AT&T, T-Mobile (93, 88, 81 of 110); on signal quality it is Verizon, AT&T, T-Mobile. All three medians sit above the −95 dBm line. The order reproduces from the tile export alone.

Why the baseline matters

The City of Phoenix runs an airport-wide cellular distributed antenna system (DAS) program that covers Terminals 3 and 4, the Rental Car Center, the parking garages, the cell-phone and taxi lots, the PHX Sky Train stations and adjacent aviation buildings, with AT&T, Verizon and T-Mobile named as the carrier team held. The City's project page records construction and installation as ongoing and continuing through spring 2027, so the system was being built across the whole analysis window held. The City procured it as revenue contract solicitation AVN RCS 21-008, issued in December 2020 with responses due March 2, 2021, for a third party to design, install, operate, manage and maintain a turnkey DAS for all wireless service providers held. The reconciled Airport DAS Master (2026-07-28) records PHX as DAS yes, self-owned no, neutral host yes, operator a carrier consortium led by AT&T Mobility, contract term 2025 to 2035 at year precision, with the field note that installation of a new system is under way, and a Phoenix Aviation Advisory Board agenda packet (2026-02-19) describes the Sky Harbor DAS as an AT&T revenue contract with construction running through spring 2027 across Terminals 3 and 4, the Rental Car Center, the garages, and the Sky Train stations, funded by the contractor on a revenue-share basis rather than as a capital line Imagine knowledge graph. The public record names the carrier team and the campus-wide scope, but it does not say which buildings carry service on the new system in this window, or which bands each carrier has on it, so nothing in this report attributes any carrier's reading to the DAS. What the record does establish is that the venue is mid-installation: this window is the baseline reading, and section 14 writes the per-building criteria the after reading is measured against. Because which buildings already carried service is not held, the baseline may blend served and unserved space.

What the pattern is consistent with (inference)

Band first. Verizon's strongest-serving 5G band is NR3700 on 74% of its 9,798 band-reporting 5G tiles; AT&T's is NR3700 on 82% of 1,366 (a smaller cell-resolved sample, section 9.1); T-Mobile's is NR2500 on 63% of 15,875. Three healthy gate medians over low-rise, wide-apron concourses is the expected macro propagation picture for this venue: the 80 m gate join reaches apron and roadway as much as building. The building-masked view is where the carriers separate: over the Gates D11 to D18 footprint AT&T is healthy on 57% of tiles against 9% for Verizon and 16% for T-Mobile, and over Terminal 3 T-Mobile is healthy on 92% against 82% and 69%. A per-building split of that shape is consistent with in-building sources that serve one carrier and not the others, which is what a DAS in phased installation would produce, and equally with macro-site geometry. The export cannot separate the two, and this report does not state that any carrier is on any in-building system.

How to read the order

Every ranking in this report is signal-layer: RSRP and signal-to-interference-plus-noise ratio (SINR) from an Android crowdsource panel. The export contains no throughput or latency, so it measures where signal is. It does not measure whether a call or app fails, and a strong-signal network can still be congested. The panel's composition differs by carrier and is Android-only, and handset vintage decides which devices can report C-band 5G (Verizon, AT&T) versus n41 (T-Mobile) at all, so cross-carrier comparisons inherit a device-population bias the export cannot correct. Nothing in this report is measured indoors; gate and tenant values are tiles within 80 m of a point (section 16).

Section 2

Venue snapshot and asset inventory

Operator · gate points · in-building record

Provenance legend: measured values compute from the Ookla exports at build time. Facts marked "held" come from a source document pinned in this build and checksummed in the verification bundle: the City of Phoenix Aviation Department page, the airport's history, facts, statistics and airline pages, the official Terminal 4 Level 3 gate map, the Terminal 3 modernization media kit, the City's cellular distributed antenna system project page, the airport Wi-Fi page, and a Phoenix Aviation Advisory Board agenda packet. Facts marked "not independently verified" are public record that this build cites without holding a copy. Facts marked "Imagine knowledge graph" come from the pinned Imagine knowledge-graph snapshot.

ElementValueNotes
Airport / IATA / ICAOPhoenix Sky Harbor International Airport / PHX / KPHXFAA large hub not independently verified; 51,618,649 total passengers in 2025, -1.4% versus 2024 (airport statistics page held; passengers in both directions, a different basis from the FAA enplanement figure used in section 12)
Operating authorityCity of Phoenix Aviation DepartmentA municipal department run as an enterprise fund of the City of Phoenix; major contracts and leases go to City Council on the recommendation of the nine-member Phoenix Aviation Advisory Board, and the airport states that no tax dollars fund its capital program. Terminal 4 and Terminal 3 are both operated directly by the department, with no private terminal lessee held
Terminals analyzed2Terminal 3: Advanced Air, Air Canada, Alaska Airlines, Allegiant, Breeze Airways, Delta Air Lines, Denver Air Connection, Frontier Airlines, Hawaiian Airlines, JetBlue Airways, Porter Airlines, Southern Airways Express, Sun Country Airlines, and United Airlines; two concourses, the North Concourse with gates E1 to E10 and the South Concourse with gates F1 to F15, after a 590 million dollar modernization completed in 2020; all gates are common use. Terminal 4: Aeromexico, Air France, American Airlines, British Airways, China Airlines, Contour Airlines, Southwest Airlines, STARLUX Airlines, Volaris, and WestJet; eight concourses on Level 3, four on the north side carrying the A and B gates and four on the south side carrying the C and D gates. The official Level 3 map, revision October 2, 2022, assigns gates A1 to A30 and B1 to B22 to American Airlines, gates B23 to B28 to international carriers, and gates C1 to C19 and D1 to D8 to Southwest Airlines; gates D11 to D18 in the 2022 concourse are Southwest. Airlines that began service after that map, including China Airlines and STARLUX Airlines, are not assigned to a concourse in any held source. Terminal 2 closed on February 4, 2020 after 58 years of service and its site now holds aircraft parking positions, so two terminals carried the whole window all held
Zones for tile assignment6Concourse A (Terminal 4) · Concourse B (Terminal 4) · Concourse C (Terminal 4) · Concourse D (Terminal 4) · Concourse E (Terminal 3) · Concourse F (Terminal 3) (nearest gate or tenant point within 500 m)
Gate points analyzed110Concourse A 28, Concourse B 30, Concourse C 16, Concourse D 16, Concourse E 10, Concourse F 10 (OpenStreetMap inventory pinned 2026-09-16, zoned by the concourse letter in the gate ref and checked against the terminal footprint). The official Terminal 4 Level 3 map, revision October 2, 2022, publishes gates A1 to A30, B1 to B28 with B23 to B28 international, C1 to C9 and C11 to C19, D1 to D8, and the airport's history page adds gates D11 to D18 in the 2022 concourse; Terminal 3 publishes gates E1 to E10 in the North Concourse and F1 to F15 in the South Concourse, with the terminal total stated as 25 gates in the 2020 modernization record and as 20 in a 2025 City release that adds six more held. The measured inventory is smaller than the published one and the reconciliation is tabulated in section 2.1; 1 further OpenStreetMap node on the airport carries the tag but no concourse letter and number (ref 'D', OpenStreetMap id 3081169829) and is excluded from every figure in this report
Mapped venue points11750 food · 33 retail · 21 transport_admin · 7 services · 3 lounge · 3 other. Zone attribution: A 23, B 27, C 14, D 8, E 12, F 16, outside zones 17. OpenStreetMap capture, pinned 2026-09-16 transcribed points only. 132 points were captured and 15 were excluded before analysis because they are not venue points: named views of distant landmarks, public art, building fabric, airfield and tower infrastructure, and a cargo operator facility. 6 points were refiled where the capture's category contradicted the point's function, including three airline and card-issuer lounges captured as other. Every call is listed with its reason in the audit dossier
Carriers measured3T-Mobile · Verizon · AT&T (27,206 unique RF tiles; 50,313 carrier-tile observations; 26,948 All Networks usage tiles)
In-building cellularCity airport-wide cellular DAS program, under construction through spring 2027; carrier team AT&T, Verizon and T-MobileThe City of Phoenix runs an airport-wide cellular distributed antenna system (DAS) program that covers Terminals 3 and 4, the Rental Car Center, the parking garages, the cell-phone and taxi lots, the PHX Sky Train stations and adjacent aviation buildings, with AT&T, Verizon and T-Mobile named as the carrier team; the City's project page records construction and installation as ongoing and continuing through spring 2027, so the system was being built across the whole analysis window; the City procured it as revenue contract solicitation AVN RCS 21-008, issued in December 2020 with responses due March 2, 2021, for a third party to design, install, operate, manage and maintain a turnkey DAS for all wireless service providers; the solicitation required that legacy in-building systems, repeaters, bi-directional amplifiers and standalone carrier systems inside the DAS coverage area be decommissioned once the new system carries service all held. The solicitation's coverage exhibit names Terminal 3 levels 1 to 4, the North and South concourses, the curbside and the ramp areas outside each gate, and the same exhibit names Terminal 4 levels 1 to 4 including the boarding bridges, the seven concourses that existed then, and the concourse that was under construction and opened in June 2022 Imagine knowledge graph. The reconciled Airport DAS Master (2026-07-28) records PHX as DAS yes, self-owned no, neutral host yes, operator a carrier consortium led by AT&T Mobility, contract term 2025 to 2035 at year precision, with the field note that installation of a new system is under way; a Phoenix Aviation Advisory Board agenda packet (2026-02-19) describes the Sky Harbor DAS as an AT&T revenue contract with construction running through spring 2027 across Terminals 3 and 4, the Rental Car Center, the garages, and the Sky Train stations, funded by the contractor on a revenue-share basis rather than as a capital line Imagine knowledge graph. Which buildings carry service on the new system in this window, and which bands each carrier has on it, are open items (section 8)
Knowledge-graph coverageProfile, DAS and Boingo deployments, RFP and board evidenceProfile: large hub (the graph also holds an enplanement count with no year recorded; it is not published here, because the dated FAA calendar-2024 figure in section 12 is the report's single enplanement basis). Deployments: AT&T Mobility DAS; Boingo Wireless Wi-Fi; Boingo Wireless Passpoint. Contracts query not available; no leadership rows Imagine knowledge graph
Public Wi-FiSSID Free PHX Boingo WiFiBoingo Wireless under City of Phoenix contract 152010, a revenue contract covering the public areas of both terminals and the Rental Car Center; the City extended it through July 31, 2026 and then month to month while it transitions the service in house held; the City reports more than 37,000 users a day on the public Wi-Fi and more than 13.7 million users across 2024 held; the graph also holds active Boingo Wireless Wi-Fi and Passpoint deployments Imagine knowledge graph
Capital programA new west terminal between Terminal 3 and Taxiway U is in planning, the first new terminal since 1990, with construction indicated for 2029 to 2033 and an opening in 2033 at a figure the City has put at around 4 billion dollars; an 84.3 million dollar federal grant announced in January 2025 funds the new Taxiway U bridgeThe 310 million dollar Terminal 4 eighth concourse, eight gates for Southwest Airlines, opened to the public on June 20, 2022; the 590 million dollar Terminal 3 modernization finished in 2020, and a further concourse on the north side of Terminal 3 is under construction for six more gates at about 368 million dollars including enabling work, targeted to open in 2027; an expanded lower-level gate area in the Terminal 3 South Concourse opened on July 22, 2026, inside this window; stage 2 of the PHX Sky Train, a 745 million dollar extension to the Rental Car Center with new 24th Street and Rental Car Center stations, opened on December 20, 2022 and removed 84 rental-car shuttle buses from the roadways not independently verified
Ground transportThe PHX Sky Train, a free 24-hour automated people mover with six stations at 44th Street and Washington, East Economy, Terminal 4, Terminal 3, 24th Street and the Rental Car CenterContext only not independently verified
RecognitionThird among mega airports in the J.D. Power North America Airport Satisfaction Study in both 2025 and 2026, and top-ten placings for shopping, dining and large airports in the 2025 USA Today 10Best readers' choice awardsContext only not independently verified
Photo · Aerial view of Sky Harbor, May 2025Wikimedia Commons
Aerial photograph of Phoenix Sky Harbor International Airport in May 2025, with Terminal 4 and its concourses in the foreground and Terminal 3 beyond, aircraft at the gates and the runways behind

Aerial view of Sky Harbor, May 2025: Terminal 4 with its concourses in the foreground, Terminal 3 beyond. Illustrative only. Photo: Designism, CC0, via Wikimedia Commons. Resized only.

Fig. 1 · Venue map · aerodrome, OSM terminal buildings, 110 gate points, 27,206 unique RF tilesSource · Ookla
Map of the KPHX aerodrome outline with the OpenStreetMap footprints for Terminal 3, Terminal 4 and the Gates D11 to D18 building, 110 gate points labelled with concourse letters, and the on-airport RF tile centroids as a light dot field, north up with a scale bar in meters

Venue map: aerodrome outline, OSM terminal buildings, 110 gates with concourse letters, and the 50,313 on-airport RF tile centroids. North up; scale bar in meters. Source: Ookla Cell Analytics per-carrier RF tile export, 2025-09-01 to 2026-08-31.

Photo · PHX Sky Train at the Terminal 4 station, October 2023Wikimedia Commons
Photograph of a PHX Sky Train automated people mover vehicle at the Terminal 4 station in October 2023, with the elevated guideway and station platform

PHX Sky Train at the Terminal 4 station, October 2023. The Sky Train stations are named in the DAS coverage exhibit. Photo: Hunter Trick (TrickHunter), CC BY-SA 4.0, via Wikimedia Commons. Illustrative, resized only.

2.1 Measured gate inventory against the published gate list

The analysis uses the 110 measured points. Of the 117 gates on the published lists, 10 have no measured point in the pinned OpenStreetMap inventory, so a per-concourse count in this report is a count of measured points and is written that way throughout. Points carried in OpenStreetMap that are not on the published list (the B1A, B15A and B15B hardstands) are kept and labelled with their OpenStreetMap ref. Aligning the two lists is a request to the Aviation Department (section 15), and no gate-named criterion in section 14 should be adopted before that is done.

ConcoursePublished gatesMeasured pointsPublished but not measuredMeasured but not on the published list
Concourse A3028A15, A16none
Concourse B2830B15B1A, B15A, B15B
Concourse C1816C5, C17none
Concourse D1616nonenone
Concourse E1010nonenone
Concourse F1510F11, F12, F13, F14, F15none
Download the full report (PDF · rev 1)
Section 3

Carrier findings

Ordered by gate median · strongest first

Every cellular number in this report is an aggregate of crowdsourced background scans from consumer Android devices (about 3% of handsets; iOS devices are not sampled), binned by Ookla to map tiles of about 9 m by 11 m, then joined to gate and tenant points. The numbers describe where devices were over a 12-month window. They are not drive-test measurements. Every n counts tiles, and every table carries its n so thin cells are visible.

3.0 Carrier summary
Carrier5G RSRP median5G SINR medianLTE RSRP medianHealthy 5G gatesn (gates / RF tiles)
T-Mobile−89.7 dBm+10.2 dB−93.8 dBm81 of 110110 / 18,918
Verizon−90.2 dBm+16.2 dB−89.5 dBm93 of 110110 / 18,513
AT&T−91.5 dBm+13.8 dB−88.6 dBm88 of 110110 / 12,882

Healthy = gate mean ≥ −95 dBm. SINR healthy (≥ 10 dB): Verizon 103, AT&T 98, T-Mobile 61 of 110 gates. LTE healthy gates: AT&T 102, Verizon 86, T-Mobile 60 of 110. Strongest LTE reading: AT&T 64, Verizon 36, T-Mobile 10 gates. Full per-gate tables ship in the PDF appendices.

5G footprint and conditional medians (tile basis). Each 5G median is conditional on the tile reporting a 5G reading; the last column combines presence and level.

Carrier5G footprint (% of tiles)5G RSRP median over reporting tilesLTE RSRP medianLTE-only tiles5G present and healthy (% of all tiles)n (tiles)
T-Mobile92%−90.0 dBm−93.0 dBm7%66%18,918
Verizon80%−90.0 dBm−91.0 dBm19%57%18,513
AT&T48%−92.0 dBm−92.0 dBm49%29%12,882
Fig. 2 · Venue medians across 110 gates · locked threshold ladderSource · Ookla
Bar panels of the venue median 5G RSRP, 5G SINR and LTE RSRP per carrier against the healthy, at-risk and critical threshold lines, with n on every bar; all three carriers sit above the healthy 5G line

Venue medians across 110 gates against the locked threshold ladder (section 16). The two received-power panels draw bars from −115 dBm, so a longer bar is a stronger signal. Locked ladder: healthy ≥ −95 · at-risk −95 to −110 · critical < −110 dBm. Source: Ookla Cell Analytics per-carrier RF tile export, 2025-09-01 to 2026-08-31.

Fig. 3 · SINR distribution per carrier at gate-point levelSource · Ookla
Distribution of per-gate-point 5G SINR for each carrier with the 10 dB healthy line; Verizon sits highest and T-Mobile lowest, on different band mixes

SINR distribution per carrier at gate-point level. Read across carriers with care: SINR depends on the serving band's bandwidth and on neighbour loading, and these carriers sit on different bands here (section 9.1 gives each carrier's strongest-serving band mix), so a cross-carrier SINR gap is not a like-for-like comparison. Source: Ookla Cell Analytics per-carrier RF tile export, 2025-09-01 to 2026-08-31.

Cross-carrier SINR comparison, stated once and applied throughout

The three carriers are not on the same spectrum at this venue. Section 9.1 shows the strongest-serving band mix, and a carrier whose 5G sits mostly on a wide mid-band channel will not produce an SINR distribution comparable to one sitting mostly on a different band with different neighbour loading and a different receiver population. Within a carrier, SINR across zones is a fair comparison and is used that way; across carriers it is context, not a ranking.

Fig. 4 · 5G NR RSRP by tile and carrier · terminal area · locked coverage classSource · Ookla
Three side-by-side tile maps of the PHX terminal area for T-Mobile, Verizon and AT&T, each tile colored healthy, at-risk or critical by 5G RSRP with grey for no 5G reading, terminal footprints and gate labels overlaid; T-Mobile is green along Concourse B and Terminal 3 with amber over the east end of Terminal 4, while AT&T is green over the east end of Terminal 4 and amber over Terminal 3 and Concourse B

Terminal-area map of 5G NR RSRP by tile and carrier, colored by the locked coverage class. Grey tiles carry no 5G reading. Each tile is about 9 m by 11 m; n is the tile count per panel. Source: Ookla Cell Analytics per-carrier RF tile export, 2025-09-01 to 2026-08-31.

What each carrier's readings show
What the T-Mobile readings show

Tied with Verizon at the gate-area 5G median, healthy at the fewest gate points of the three (81 of 110), and the lowest 5G SINR median (+10.2 dB, on a different band mix from the other two). Its strongest place is over the Terminal 3 footprint (92% of tiles healthy) and its weakest is over the Gates D11 to D18 footprint (16%, median −102.0 dBm). On the zone basis its lowest concourse is Concourse D. A re-measurement over the Gates D11 to D18 footprint is the clearest test of whether the new system carries T-Mobile there.

What the Verizon readings show

Tied with T-Mobile at the gate-area 5G median, healthy at the most gate points (93 of 110), and the highest 5G SINR median of the three (+16.2 dB, on a different band mix from the other two, so that gap is context and not a ranking). Its one weak place is over the Gates D11 to D18 footprint, where it is healthy on 9% of tiles with a median of −106.0 dBm, the lowest cell in the building-masked table. That footprint is therefore where a re-measurement would show the largest change for Verizon if the new system carries service there.

What the AT&T readings show

Third at the gate-area 5G median by 1.4 dB, and the strongest LTE layer of the three (64 of 110 gate points, median −88.6 dBm). Its 5G reports on 48% of its tiles, the smallest share of the three, which this report does not read as a coverage figure because the share is confounded by the panel's handset mix (section 16). Over the Gates D11 to D18 footprint it is the least weak of the three (57% of tiles healthy, median −94.0 dBm), in a building where the other two are at 16% and 9%; over the Terminal 3 and Terminal 4 footprints it is the weakest of the three (69% and 74%). The knowledge graph names AT&T Mobility as the lead of the DAS carrier consortium Imagine knowledge graph; whether that explains the pattern is a Recommendation 1 question, not a finding here.

3.1 T-Mobile results

T-Mobile is tied with Verizon at the top of the 5G gate median (−89.7 dBm, 0.5 dB apart). 81 of 110 gates (73.6%; 10 gates within 1 dB of the line) are healthy, 29 at risk, 0 critical; on that count it trails Verizon (93) and AT&T (88). It is the strongest 5G reading at 46 of 110 gates, 25 of them in Concourse B (T-Mobile 25, Verizon 4, AT&T 1; n=30 gates). SINR is +10.2 dB at the median (61 of 110 gates healthy), the lowest of the three. It reports 5G on 92% of its on-airport tiles (17,312 of 18,918); Verizon reports 5G on 80% and AT&T on 48%. Its LTE layer is the weakest of the three: LTE gate median −93.8 dBm, healthy at 60 of 110 gates, strongest LTE reading at 10 gates.

Healthy tile shares by zone: Concourse A 60%, Concourse B 92%, Concourse C 77%, Concourse D 44%, Concourse E 67%, Concourse F 58% (n ≥ 994 tiles per zone). Its lowest zone is Terminal 4 Concourse D. Over the pinned building footprints (section 4.7) it is healthy on 92% of Terminal 3 tiles, 77% of Terminal 4 tiles, and 16% of the Gates D11 to D18 building. Fig. 4 shows the pattern: green along Concourse B and Terminal 3, amber over the east end of Terminal 4. Its terminal-vs-periphery proxy is −1.0 dB (section 5.2). T-Mobile is the weakest carrier at 28 of 110 ranked asymmetry gates.

3.2 Verizon results

Verizon's 5G gate median is −90.2 dBm, tied with T-Mobile (0.5 dB apart) and 1.4 dB ahead of AT&T. 93 of 110 gates (84.5%; 6 gates within 1 dB of the line) are healthy, the most of the three, with 17 at risk and 0 critical. Its 5G signal quality is the best of the three: SINR median +16.2 dB, healthy at 103 of 110 gates. It is the strongest 5G reading at 29 of 110 gates and reports 5G on 80% of its on-airport tiles (14,734 of 18,513). Its LTE layer is healthy: LTE gate median −89.5 dBm (86 of 110 gates), strongest LTE reading at 36 gates.

Healthy tile shares by zone: Concourse A 63%, Concourse B 78%, Concourse C 66%, Concourse D 54%, Concourse E 72%, Concourse F 75% (n ≥ 915 tiles per zone). Its lowest zone is Terminal 4 Concourse D. Over the footprints Verizon is healthy on 84% of Terminal 4 tiles and 82% of Terminal 3 tiles, but on 9% of the Gates D11 to D18 building (median −106.0 dBm, n=98), the lowest cell in the building-masked table (section 4.7). Verizon's 5G is C-band (NR3700 on 74% of its band-reporting 5G tiles), so a healthy gate median with one weak building is consistent with macro C-band that reaches the apron-side gates and not the interior of the newest building; whether that building has a live in-building source for any carrier is a Recommendation 1 question. Its terminal-vs-periphery proxy is +2.0 dB (section 5.2). Verizon is the weakest carrier at 33 of 110 ranked asymmetry gates.

3.3 AT&T results

AT&T's 5G gate median is −91.5 dBm, 1.4 dB behind Verizon and 1.9 dB behind T-Mobile, and above the healthy line. 88 of 110 gates (80.0%; 16 gates within 1 dB of the line) are healthy, 22 at risk, 0 critical. SINR is +13.8 dB at the median (98 of 110 gates healthy). It is the strongest 5G reading at 35 of 110 gates, leading the count in Concourse A, Concourse C, Concourse D and Concourse E (Concourse A AT&T 10, T-Mobile 9, Verizon 9, n=28; Concourse C AT&T 7, T-Mobile 6, Verizon 3, n=16; Concourse D AT&T 11, Verizon 5, n=16; Concourse E AT&T 6, Verizon 4, n=10; counts). AT&T is the weakest carrier at 49 of 110 ranked asymmetry gates.

The 5G footprint is the smallest of the three: AT&T reports 5G on 48% of its on-airport tiles (6,179 of 12,882); tiles with an LTE reading but no 5G reading are 49% of its tiles. AT&T's LTE layer carries its own service well here: strongest LTE reading at 64 of 110 gates, LTE gate median −88.6 dBm, healthy at 102 of 110 gates. Healthy tile shares by zone: Concourse A 58%, Concourse B 58%, Concourse C 71%, Concourse D 67%, Concourse E 73%, Concourse F 57% (n ≥ 440 tiles per zone); its lowest zone is Terminal 3 Concourse F (South). Over the footprints AT&T is healthy on 57% of the Gates D11 to D18 building (median −94.0 dBm, n=68), the highest of the three there, against 74% of Terminal 4 and 69% of Terminal 3, the lowest of the three in both. AT&T's 5G is NR3700 on 82% of 1,366 band-reporting 5G tiles (a smaller cell-resolved sample). On Fig. 4, AT&T's panel shows green over the east end of Terminal 4 and amber over Terminal 3 and Concourse B; the building-masked view (section 4.7) quantifies it per building.

3.4 5G footprint and coverage-band attachment
Fig. 5 · 5G footprint · share of tiles with a 5G NR readingSource · Ookla
Bar chart of the share of each carrier's on-airport tiles that report a 5G NR reading, with tile counts; T-Mobile 92 percent, Verizon 80 percent, AT&T 48 percent, marked as a confounded statistic

Share of each carrier's on-airport tiles that report a 5G NR reading (5G footprint). CONFOUNDED: a tile reports 5G only if a handset in the panel could report that carrier's 5G band, so this share mixes the carrier's 5G deployment with the mix of 5G-capable handsets that carrier has in an Android crowdsource panel. It is not a coverage measurement and the carriers are not comparable on it (section 16). Source: Ookla Cell Analytics per-carrier RF tile export, 2025-09-01 to 2026-08-31.

Fig. 6 · LTE percent-low-band per carrier · mean, share above zero, p90Source · Ookla
Figure of LTE percent-low-band per carrier showing mean, share of tiles above zero and p90 with tile counts; AT&T carries the highest mean and Verizon and AT&T both reach a p90 of 50 percent

LTE percent-low-band per carrier: mean, share of tiles above zero, and p90. Higher means more attachment to sub-1 GHz coverage bands. Source: Ookla Cell Analytics per-carrier RF tile export, 2025-09-01 to 2026-08-31.

The percent-low-band statistic describes LTE coverage-band attachment. A tile that attaches to sub-1 GHz spectrum is using a coverage-grade band, which propagation, carrier idle-mode priorities, and site geometry all drive. T-Mobile mean 1.7% (tiles above zero: 6% of n=18,763; p90 0%) · Verizon mean 12.7% (tiles above zero: 36% of n=18,271; p90 50%) · AT&T mean 14.2% (tiles above zero: 39% of n=12,558; p90 50%).

The LTE metric does not see 5G low band. On the 5G side: T-Mobile: NR600 on 666 tiles, 4.2% of its 15,875 band-reporting NR tiles. Verizon: NR600 on 1 tile, 0.0% of its 9,798 band-reporting NR tiles, and NR850 on 723 tiles, 7.4% of the same 9,798. AT&T: NR600 on 1 tile, 0.1% of its 1,366 band-reporting NR tiles, and NR850 on 12 tiles, 0.9% of the same 1,366. Section 9.1 lists the bands.

3.5 RSRQ, channel quality (CQI), and optimization priority

RSRQ medians: T-Mobile NR −11.0 / LTE −13.0 dB; Verizon NR −11.0 / LTE −12.0 dB; AT&T NR −11.0 / LTE −13.0 dB. Every carrier's medians sit below the -10 dB line on both technologies. Medians of −11 to −14 dB are ordinary loaded-network values, and the line is a generic reference, not a venue-specified threshold, so this is a venue-wide observation to read together with SINR, not a failure call. RSRQ degrades as subframe utilization rises, so a weak RSRQ on a strong-RSRP network is consistent with a loaded serving layer. This is an inference; the export carries no load field (section 16).

CQI medians: T-Mobile median 7.0 (n=4,222); Verizon median 9.0 (n=3,875); AT&T median 9.0 (n=4,726). CQI is the closest throughput proxy in an export that carries no throughput fields. Ookla's LTE optimization priority is the vendor's own index for tiles where signal is strong but quality is poor. Venue medians: T-Mobile median 62 (n=8,310); Verizon median 60 (n=13,655); AT&T median 61 (n=10,462). The discriminating signal is in the distribution tails. The RSRQ, CQI, and optimization-priority distributions (Figs. 7 and 8) ship in the PDF.

3.6 Serving-cell volatility (handover-churn proxy)

Where the strongest cell at a tile is not the most-frequent serving cell, the network is handing over between competing cells. Measured churn: T-Mobile LTE 36% (n=10,872) / 5G 39% (n=15,874); Verizon LTE 35% (n=15,156) / 5G 23% (n=9,793); AT&T LTE 40% (n=12,214) / 5G 7% (n=1,365). Cell, PCI, and band fields populate only where Ookla resolved a serving cell, which is why AT&T's 5G n is 1,365 here against 6,179 for RSRP (field population table, section 16). AT&T's 5G churn therefore rests on 1,365 cell-resolved tiles and is not compared with the other two; its bar is hatched. Churn blends macro-sector overlap with any in-building system's handoff to the macro layer. This is a proxy; the export carries no handover trace. Fig. 9 ships in the PDF.

Section 4

The view by concourse zone

Six concourses · tile basis

Concourse zone gate counts (Concourse A 28, Concourse B 30, Concourse C 16, Concourse D 16, Concourse E 10, Concourse F 10): only Concourse B clears the 30-point floor on the gate basis, so its gate shares are shown as percentages; every other concourse's gate tallies appear as counts and are never ranked. For one consistent basis, every zone comparison in this section runs on the tile basis: a tile belongs to the zone of its nearest gate or tenant point within 500 m, which gives hundreds of tiles per carrier per zone. Zones are the six concourses (A to D at Terminal 4, E and F at Terminal 3), from the concourse letter in each gate ref.

4.1 Healthy share and median RSRP by zone
These zone figures are not a leader board

A concourse zone is the set of tiles nearest that concourse's gate and venue points within 500 m, so it holds apron, taxiway and roadway as well as building, and section 4.7 carries the only basis on which this report names a leader. Read the zone rows as the spread within a zone: the widest carrier-to-carrier gap in healthy tile share is Concourse B at 34 points, and the narrowest is Concourse A at 5 points. Lowest zone per carrier on the healthy tile share: T-Mobile in Concourse D (44%), Verizon in Concourse D (54%), AT&T in Concourse F (57%). The lowest zone differs by carrier.

ZoneT-Mobile healthy tilesVerizon healthy tilesAT&T healthy tilesMedian 5G RSRP (dBm)
T-Mobile / Verizon / AT&T
Concourse A (T4)60%n=1,95763%n=1,86558%n=927−93.0 / −92.0 / −93.0
Concourse B (T4)92%n=2,49278%n=1,81858%n=886−83.0 / −89.0 / −94.0
Concourse C (T4)77%n=1,25866%n=1,17271%n=480−89.0 / −92.0 / −90.0
Concourse D (T4)44%n=99454%n=91567%n=440−97.0 / −94.0 / −91.0
Concourse E (T3)67%n=1,26772%n=1,05273%n=505−92.0 / −92.0 / −86.0
Concourse F (T3)58%n=2,06475%n=2,05157%n=767−94.0 / −89.0 / −94.0

Healthy share and median on the tile basis; n = tiles per carrier per zone. Healthy = tile 5G RSRP ≥ −95 dBm. Each zone pool includes apron, taxiway and roadway tiles.

Fig. 10 · Healthy 5G tile share by zone and carrierSource · Ookla
Grouped bar chart of the share of zone tiles with healthy 5G RSRP for each carrier across the six concourse zones, with minimum n per carrier on the axis

Share of zone tiles with healthy 5G RSRP by carrier (tile basis; minimum n per carrier on the axis). Source: Ookla Cell Analytics per-carrier RF tile export, 2025-09-01 to 2026-08-31.

Fig. 11 · Median 5G RSRP by zone and carrierSource · Ookla
Grouped bar chart of per-zone median 5G RSRP per carrier on the tile basis against the healthy line across the six concourse zones

Per-zone median 5G RSRP per carrier (tile basis). Source: Ookla Cell Analytics per-carrier RF tile export, 2025-09-01 to 2026-08-31.

Fig. 12 · LTE RSRP by tile and carrier · terminal area · locked coverage classSource · Ookla
Three side-by-side tile maps of the terminal area for T-Mobile, Verizon and AT&T, each tile colored by LTE RSRP coverage class with grey for no LTE reading; AT&T and Verizon show healthy LTE across the terminals where T-Mobile shows more at-risk tiles

Terminal-area map of LTE RSRP by tile and carrier, colored by the locked coverage class. Grey tiles carry no LTE reading. Source: Ookla Cell Analytics per-carrier RF tile export, 2025-09-01 to 2026-08-31.

4.2 Coverage class and PCI diversity

Critical-band gates (below −110 dBm) by carrier: T-Mobile 0, Verizon 0, AT&T 0 of 110 gates (counts). On the tile basis the critical share peaks at T-Mobile 1% in Concourse D (n=994); Verizon 3% in Concourse D (n=915); AT&T 4% in Concourse A (n=927). Lowest healthy share in any zone: T-Mobile 44% (Concourse D); Verizon 54% (Concourse D); AT&T 57% (Concourse F).

Fig. 13 · Coverage-class distribution by concourse zone and carrierSource · Ookla
Stacked bar chart of healthy, at-risk and critical tile shares by concourse zone for each carrier, labelled T for T-Mobile, V for Verizon and A for AT&T

Coverage-class distribution by concourse zone and carrier (tile basis; T = T-Mobile, V = Verizon, A = AT&T). Source: Ookla Cell Analytics per-carrier RF tile export, 2025-09-01 to 2026-08-31.

The PCI picture in each zone reflects which sectors reach it, macro or in-building. Higher diversity with healthy SINR means several sectors serve the zone cleanly. Higher diversity with poor SINR means they compete. The raw unique counts are not comparable across carriers, because the cell-resolved samples behind them differ by more than an order of magnitude (T-Mobile 15,874, Verizon 9,793, AT&T 1,365 tiles), which is why Fig. 14 draws the bars per 1,000 cell-resolved tiles. Even normalized, this metric is a sampling statistic as much as a network property: PCI counts accumulate over 12 months across every 5G layer a carrier runs, so reassignment and multi-carrier layers inflate them. Read it as a prompt to look at SINR in the same zone, not as a ranking. Fig. 14 ships in the PDF.

4.3 Cross-carrier concordance by gate

This split shapes the infrastructure question. A gate weak for all three carriers points to a gate-area problem for that gate's 80 m circle, which can include apron. A gate weak for exactly one carrier points to that carrier's path.

62
Gates healthy for all three carriers · of 110
28
Gates weak for exactly one carrier · T-Mobile 11 · Verizon 3 · AT&T 14
20
Gates weak for two carriers · T-Mobile and Verizon 12 · T-Mobile and AT&T 6 · Verizon and AT&T 2
0
Gates weak for all three carriers

At 62 of 110 gates every carrier is healthy, and where a gate is weak it is most often one carrier's path (28 one-weak gates against 20 with two or more weak). That is a per-carrier picture, not a venue-wide gap, and it is what the per-building split in section 4.7 also shows: the carrier that is weak changes from building to building. The concordance does not by itself say which buildings carry service on the new system; Recommendation 1 asks for the per-building phase map.

Fig. 15 · Carriers below the healthy line per gate, by concourse zoneSource · Ookla
Per concourse zone count of gates by how many of the three carriers fall below the healthy 5G line at that gate; the all-three-weak category is empty everywhere and one-carrier-weak dominates

Per concourse zone: how many of the three carriers are below the healthy line at each gate (gate counts). Healthy = gate mean 5G RSRP ≥ −95 dBm. Source: Ookla Cell Analytics per-carrier RF tile export, 2025-09-01 to 2026-08-31.

4.4 Terminal 4 Concourses A and B

Terminal 4 has eight concourses on Level 3, four on the north side carrying the A and B gates and four on the south side carrying the C and D gates. The official Level 3 map, revision October 2, 2022, assigns gates A1 to A30 and B1 to B22 to American Airlines, gates B23 to B28 to international carriers, and gates C1 to C19 and D1 to D8 to Southwest Airlines; gates D11 to D18 in the 2022 concourse are Southwest. Airlines that began service after that map, including China Airlines and STARLUX Airlines, are not assigned to a concourse in any held source held.

Concourse A hosts American Airlines held (gates A1 to A14 and A15 to A30 per the official Terminal 4 Level 3 map rev. 2022-10-02). It holds 28 of the 110 measured gates. Best-5G counts: AT&T 10, T-Mobile 9, Verizon 9. Healthy 5G gates: T-Mobile 15 of 28, Verizon 21 of 28, AT&T 18 of 28 (counts). Gate-basis 5G medians: T-Mobile −93.5, Verizon −91.7, AT&T −93.1 dBm. Tile-basis healthy shares: T-Mobile 60%, Verizon 63%, AT&T 58% (n ≥ 927 tiles per carrier), a carrier-to-carrier spread of 5 points on a pool that includes apron and roadway.

Concourse B hosts American Airlines, with B23 to B28 international held (gates B1 to B14 and B15 to B22 American Airlines; B23 to B28 international, listing American, British Airways, Condor, Volaris and WestJet on the 2022 map, with China Airlines and STARLUX joining in-window and the gate area not stated). It holds 30 of the 110 measured gates. Best-5G counts: T-Mobile 25, Verizon 4, AT&T 1. Healthy 5G gates: T-Mobile 30 of 30 (100%), Verizon 30 of 30 (100%), AT&T 23 of 30 (77%). Gate-basis 5G medians: T-Mobile −85.7, Verizon −88.3, AT&T −91.5 dBm. Tile-basis healthy shares: T-Mobile 92%, Verizon 78%, AT&T 58% (n ≥ 886 tiles per carrier), a carrier-to-carrier spread of 34 points on a pool that includes apron and roadway.

Fig. 16 · Per-gate 5G RSRP · 58 Concourse A and B gatesSource · Ookla
Per-gate mean 5G RSRP bars for the 58 Concourse A and B gates across three carriers with the healthy line; T-Mobile is strongest across most of Concourse B and the carriers interleave across Concourse A

Per-gate 5G RSRP across the 58 Concourse A and B gates (OpenStreetMap inventory). Each bar is a mean over the tiles within 80 m of the gate. Bars rise from −115 dBm, so a longer bar is a stronger signal. Source: Ookla Cell Analytics per-carrier RF tile export, 2025-09-01 to 2026-08-31.

Photo · Southwest Airlines 737 on the Terminal 4 apron, July 2025Wikimedia Commons
Photograph of a Southwest Airlines Boeing 737 on the Terminal 4 apron at Phoenix Sky Harbor in July 2025, with the concourse and jet bridges behind

Southwest Airlines 737 on the Terminal 4 apron, July 2025. Photo: BeeboMan, CC BY 4.0, via Wikimedia Commons. Illustrative, resized only.

4.5 Terminal 4 Concourses C and D

Concourse C hosts Southwest Airlines held (gates C1 to C9 and C11 to C19 per the official map). It holds 16 of the 110 measured gates. Best-5G counts: AT&T 7, T-Mobile 6, Verizon 3. Healthy 5G gates: T-Mobile 16 of 16, Verizon 16 of 16, AT&T 16 of 16 (counts). Gate-basis 5G medians: T-Mobile −89.5, Verizon −89.8, AT&T −88.3 dBm. Tile-basis healthy shares: T-Mobile 77%, Verizon 66%, AT&T 71% (n ≥ 480 tiles per carrier), a carrier-to-carrier spread of 11 points on a pool that includes apron and roadway.

Concourse D hosts Southwest Airlines held (gates D1 to D8 per the official map, plus D11 to D18, the eight-gate eighth concourse opened 2022-06-20 and occupied by Southwest). It holds 16 of the 110 measured gates. Best-5G counts: AT&T 11, Verizon 5. Healthy 5G gates: T-Mobile 0 of 16, Verizon 8 of 16, AT&T 16 of 16 (counts). Gate-basis 5G medians: T-Mobile −97.3, Verizon −96.0, AT&T −93.0 dBm. Tile-basis healthy shares: T-Mobile 44%, Verizon 54%, AT&T 67% (n ≥ 440 tiles per carrier), a carrier-to-carrier spread of 23 points on a pool that includes apron and roadway.

Gates D11 to D18, the weakest building measured

Gates D11 to D18 are the 310 million dollar eighth concourse, which opened to the public on June 20, 2022 and is occupied by Southwest Airlines; it is the newest passenger building on the campus and it also added a post-security connector bridge between the D and A concourses held. Over that building's footprint the carriers separate most (section 4.7): T-Mobile 16% healthy, median −102.0 dBm (n=99); Verizon 9% healthy, median −106.0 dBm (n=98); AT&T 57% healthy, median −94.0 dBm (n=68). Verizon's 9% is the lowest cell in the building-masked table, and two of the three carriers fail more than four fifths of the tiles there.

Fig. 17 · Per-gate 5G RSRP · 32 Concourse C and D gatesSource · Ookla
Per-gate mean 5G RSRP bars for the 32 Concourse C and D gates across three carriers with the healthy line; AT&T is the strongest reading at every gate from D11 to D18 while T-Mobile and Verizon fall below the healthy line there

Per-gate 5G RSRP across the 32 Concourse C and D gates (OpenStreetMap inventory). Each bar is a mean over the tiles within 80 m of the gate. Bars rise from −115 dBm, so a longer bar is a stronger signal. Source: Ookla Cell Analytics per-carrier RF tile export, 2025-09-01 to 2026-08-31.

Photo · American Airlines 737 at gate B22, May 2025Wikimedia Commons
Photograph of an American Airlines Boeing 737 parked at Terminal 4 gate B22 in May 2025, seen from the apron with the jet bridge attached

American Airlines 737 at Terminal 4 gate B22, May 2025. Photo: Designism, CC0, via Wikimedia Commons. Illustrative, resized only.

Photo · Terminal 4 concourse dining area, August 2023Wikimedia Commons
Interior photograph of a Terminal 4 concourse dining area in August 2023, with seating, food counters and overhead signage

Terminal 4 concourse dining area, August 2023. Photo: FASTILY, CC BY-SA 4.0, via Wikimedia Commons. Illustrative, resized only.

4.6 Terminal 3 Concourses E and F

Terminal 3 has two concourses, the North Concourse with gates E1 to E10 and the South Concourse with gates F1 to F15, after a 590 million dollar modernization completed in 2020; all gates are common use held. Concourse E (North) hosts Air Canada, Alaska, Hawaiian and United primarily held (gates E1 to E10, renovated and opened February 2020; the 2020 media kit names Air Canada, Alaska, Contour, Hawaiian and United as primary users; all Terminal 3 gates are common-use and shareable across concourses). It holds 10 of the 110 measured gates. Best-5G counts: AT&T 6, Verizon 4. Healthy 5G gates: T-Mobile 10 of 10, Verizon 10 of 10, AT&T 10 of 10 (counts). Gate-basis 5G medians: T-Mobile −89.0, Verizon −89.2, AT&T −86.7 dBm. Tile-basis healthy shares: T-Mobile 67%, Verizon 72%, AT&T 73% (n ≥ 505 tiles per carrier), a carrier-to-carrier spread of 6 points on a pool that includes apron and roadway.

Concourse F (South) hosts Delta and the other Terminal 3 carriers on common-use gates held (gates F1 to F15, opened January 2019; the Delta Sky Club is in the South Concourse; the remaining Terminal 3 carriers, including Delta, Frontier, JetBlue, Allegiant, Breeze, Sun Country and Spirit until 2026-01-08, use these common-use gates; a per-airline gate assignment is not held). It holds 10 of the 110 measured gates. Best-5G counts: T-Mobile 6, Verizon 4. Healthy 5G gates: T-Mobile 10 of 10, Verizon 8 of 10, AT&T 5 of 10 (counts). Gate-basis 5G medians: T-Mobile −91.2, Verizon −92.2, AT&T −95.2 dBm. Tile-basis healthy shares: T-Mobile 58%, Verizon 75%, AT&T 57% (n ≥ 767 tiles per carrier), a carrier-to-carrier spread of 18 points on a pool that includes apron and roadway. Over the Terminal 3 footprint (section 4.7): T-Mobile 92% healthy, median −86.0 dBm (n=344); Verizon 82% healthy, median −90.0 dBm (n=333); AT&T 69% healthy, median −90.0 dBm (n=227); T-Mobile leads.

Fig. 18 · Per-gate 5G RSRP · 20 Concourse E and F gatesSource · Ookla
Per-gate mean 5G RSRP bars for the 20 Concourse E and F gates across three carriers with the healthy line; AT&T is the strongest reading across most of Concourse E while falling below the line across Concourse F

Per-gate 5G RSRP across the 20 Concourse E and F gates (OpenStreetMap inventory). Each bar is a mean over the tiles within 80 m of the gate. Bars rise from −115 dBm, so a longer bar is a stronger signal. Source: Ookla Cell Analytics per-carrier RF tile export, 2025-09-01 to 2026-08-31.

Photo · Alaska Air Group aircraft at Terminal 3, April 2025Wikimedia Commons
Photograph of Alaska Air Group aircraft parked at Terminal 3 gates at Phoenix Sky Harbor in April 2025, seen from inside the concourse through the gate windows

Alaska Air Group aircraft at Terminal 3, April 2025. Photo: Ziongarage, CC0, via Wikimedia Commons. Illustrative, resized only.

4.7 Building-masked view (OSM polygons)

The building-masked basis is the only basis on which this report names a terminal or concourse leader, because the 80 m gate join at PHX reaches apron and roadway as much as building.

Fig. 19 · Building-masked view · 5G NR class for tiles inside the OSM footprintsSource · Ookla
Three tile maps showing only the tiles whose centroids fall inside the OpenStreetMap footprints of Terminal 3, Terminal 4 and the separately mapped Gates D11 to D18 building, colored by 5G RSRP coverage class for T-Mobile, Verizon and AT&T, with the per-building per-carrier table beneath; T-Mobile is strongest over Terminal 3, Verizon over Terminal 4, and AT&T is the only carrier mostly healthy over the Gates D11 to D18 building

Tiles whose centroid falls inside a pinned OSM building polygon (Terminal 3, Terminal 4, and the separately mapped Gates D11 to D18 building), colored by 5G NR class, with the per-building per-carrier table. This is our OSM building-polygon mask, not Ookla's Indoor layer. Source: Ookla Cell Analytics per-carrier RF tile export, 2025-09-01 to 2026-08-31.

Building (OSM polygon)T-Mobile · n · healthy · medianVerizon · n · healthy · medianAT&T · n · healthy · medianLeader (tie-aware)
T3: Terminal 3344 · 92% · −86.0 dBm333 · 82% · −90.0 dBm227 · 69% · −90.0 dBmT-Mobile leads
T4: Terminal 4546 · 77% · −90.0 dBm540 · 84% · −89.0 dBm412 · 74% · −91.0 dBmVerizon leads
T4: Gates D11-D1899 · 16% · −102.0 dBm98 · 9% · −106.0 dBm68 · 57% · −94.0 dBmAT&T leads

Healthy = tile 5G RSRP ≥ −95 dBm; median over tiles inside the polygon. n counts tiles, not scans. Every ranked cell clears the 30-tile floor.

The mask is a point-in-polygon test of tile centroids against the pinned OpenStreetMap footprints, so it selects tiles over the buildings rather than tiles measured inside the buildings (section 16). It is the basis on which this report names a terminal leader, because across the 110 gate points a median of 21.6% of the tile centroids inside the 80 m join fall within a building footprint, and the highest at any gate is 37%, so a gate-area figure is mostly an outdoor ramp reading (per concourse: Concourse A 20.6%, Concourse B 22.9%, Concourse C 16.5%, Concourse D 20.1%, Concourse E 21.6%, Concourse F 26.6%). Per carrier, the lowest building is the Gates D11 to D18 building for all three (T-Mobile 16%, Verizon 9%, AT&T 57%), and the highest is Terminal 3 for T-Mobile (92%) and Terminal 4 for Verizon (84%) and AT&T (74%). The leader changes from building to building, which is the pattern a phased in-building program produces and equally the pattern macro-site geometry can produce; the attestation in Recommendation 1 decides which. Ookla's own Indoor layer is not used here (section 15).

How to read a tile map

Each tile is 0.0001° by 0.0001°, about 9 m by 11 m at 33.4° N, and is colored by the locked ladder from the tile's aggregated RSRP over the window. A tile with no reading had no 5G sample from the Android panel in the window. That means no measurement, not no coverage. Gate labels mark the pinned OSM gate points.

Section 5

Tenant level

117 points · tile basis behind each category

The 117 mapped points come from an OpenStreetMap capture pinned 2026-09-16 (points only). Category point counts sit below the 30-point floor. Category comparisons therefore run on the tile basis behind each category's points: tiles within 80 m of any point, deduplicated. Point counts appear on every axis.

5.1 Category signal strength and quality

Ranked categories clear the floor for every carrier: transport_admin, retail, food, lounge, services. Categories reported as counts only (a carrier's tile basis below 30): other (3 points). Carrier-to-carrier spread per category on the tile median: transport_admin 4 dB, retail 1 dB, food 1 dB, lounge 1 dB, services 3 dB. Spreads at or under 1 dB are not rankings, and tile RSRP is integer-valued, so a category ordering is not published here. Read the chart as a pattern; the point counts are small and every category pool includes apron and roadway tiles. Figs. 20 and 21 (median 5G RSRP and SINR by tenant category) ship in the PDF.

5.2 Terminal vs periphery RSRP proxy
−1.0 dB
T-Mobile · periphery −90.0 (n=1,835 tiles behind 24 points) · terminal −89.0 (n=3,243 tiles behind 93 points)
+2.0 dB
Verizon · periphery −87.0 (n=1,643 tiles behind 24 points) · terminal −89.0 (n=3,137 tiles behind 93 points)
−1.0 dB
AT&T · periphery −91.0 (n=851 tiles behind 24 points) · terminal −90.0 (n=1,728 tiles behind 93 points)

Periphery minus terminal median 5G RSRP, tile basis.

Terminal categories cover the concessions and services inside the terminal footprints; periphery categories cover the parking structures, the Sky Train and transit points, and roadside businesses. A large positive periphery-minus-terminal delta is consistent with macro spillover. A flat or negative delta is ambiguous between close-in macro coverage and an in-building source. Distance to macro sites confounds both readings, and the Site Finder layer (section 15) is queued to resolve it. Deltas: T-Mobile −1.0 dB, Verizon +2.0 dB, AT&T −1.0 dB. Tile RSRP is integer-valued, so medians and deltas quantize to whole dB.

Fig. 22 · Median 5G RSRP · terminal vs periphery tenant categoriesSource · Ookla
Per-carrier median 5G RSRP over terminal-category tiles beside periphery-category tiles, with n and the healthy line; the deltas are within 2 dB for every carrier

Per-carrier median 5G RSRP, terminal tenant categories vs periphery categories, on the tile basis. Proxy: category-based masking, not Ookla's building-polygon indoor mask (queued, section 15). Bars rise from −115 dBm, so a longer bar is a stronger signal. Source: Ookla Cell Analytics per-carrier RF tile export, 2025-09-01 to 2026-08-31.

5.3 Airline gate clusters

An airline reads its exposure through its concourse and the passenger's carrier. The concourse column is the airline set the official gate map and the airport's airline list place there; a per-airline gate assignment is not held for either terminal, so the rows are concourse groupings, not airline-specific measurements. Read the medians with the margins shown: margins at or under 1 dB are not rankings, tile RSRP is integer-valued, and the pool behind each row includes apron and roadway.

Concourse: airlines not independently verifiedGates (n)T-Mobile median 5G RSRPVerizon median 5G RSRPAT&T median 5G RSRP
Concourse A (Terminal 4): American Airlines28−93.0 dBmn=1,957−92.0 dBmn=1,865−93.0 dBmn=927
Concourse B (Terminal 4): American Airlines (B23-B28 international)30−83.0 dBmn=2,492−89.0 dBmn=1,818−94.0 dBmn=886
Concourse C (Terminal 4): Southwest Airlines16−89.0 dBmn=1,258−92.0 dBmn=1,172−90.0 dBmn=480
Concourse D (Terminal 4): Southwest Airlines16−97.0 dBmn=994−94.0 dBmn=915−91.0 dBmn=440
Concourse E (Terminal 3): Air Canada, Alaska, Hawaiian, United (primarily)10−92.0 dBmn=1,267−92.0 dBmn=1,052−86.0 dBmn=505
Concourse F (Terminal 3): Delta and other Terminal 3 carriers (common use)10−94.0 dBmn=2,064−89.0 dBmn=2,051−94.0 dBmn=767

Tile basis; n = tiles per carrier per concourse. Airline assignments transcribed from the official gate map and the airport's airline list.

5.4 Retail and food brand coverage

Multi-location brands are a cross-zone consistency check. Point counts are small (6 at most), so this table is a count-only view and is never ranked. Each point value is a mean over the tiles within 80 m of the point (per-point tile n in Appendix A of the PDF).

BrandPoints (n)T-Mobile median 5G RSRPVerizon median 5G RSRPAT&T median 5G RSRP
Hudson1−86.2 dBm−89.0 dBm−88.0 dBm
Starbucks6−86.8 dBm−87.7 dBm−88.5 dBm
Peet's1−93.8 dBm−88.2 dBm−89.3 dBm
Panda Express1−87.8 dBm−92.3 dBm−92.0 dBm
Wendy's1−87.4 dBm−86.1 dBm−88.7 dBm
Barrio Cafe1−96.7 dBm−91.6 dBm−93.5 dBm
Four Peaks1−96.5 dBm−90.8 dBm−95.1 dBm
Zinburger1−89.9 dBm−88.9 dBm−90.2 dBm
Blanco1−89.7 dBm−88.8 dBm−90.7 dBm
Shake Shack1−87.4 dBm−92.0 dBm−91.9 dBm
Cartel1−83.1 dBm−87.9 dBm−86.6 dBm
Tammie Coe1−96.2 dBm−93.5 dBm−95.6 dBm
Pei Wei1−96.6 dBm−90.7 dBm−95.2 dBm
La Grande Orange1−97.2 dBm−91.2 dBm−93.4 dBm
Humble Pie2−93.7 dBm−89.4 dBm−91.8 dBm
Matt's Big Breakfast1−88.0 dBm−85.5 dBm−90.9 dBm
InMotion3−87.1 dBm−87.9 dBm−88.1 dBm
Arizona Highways1−94.0 dBm−87.7 dBm−89.9 dBm

Count-only view (fewer than 30 points per brand); never ranked.

5.5 Airline lounges present in the OpenStreetMap capture

2 lounge points are in the pinned capture: Centurion Lounge and Escape Lounge. These are single-point aggregates over the tiles within 80 m of each point, reported for scope and not ranked.

Lounge pointZoneT-Mobile 5G RSRP (class, n tiles)Verizon 5G RSRP (class, n tiles)AT&T 5G RSRP (class, n tiles)
Centurion LoungeConcourse B−86.3 dBmhealthy, n=177−89.6 dBmhealthy, n=159−89.7 dBmhealthy, n=168
Escape LoungeConcourse B−86.3 dBmhealthy, n=173−89.7 dBmhealthy, n=155−90.2 dBmhealthy, n=164
Section 6

Load and density

Unique devices · zone level

Density is this dataset's demand signal. Ookla's User_Density field counts the unique Android devices observed per tile over the window, deduplicated. It does not count simultaneous users and it does not measure time spent.

ZoneMedian devices per tilep95Usage tiles (n)Worst carrier · below healthy 5G
Concourse A (T4)5772,647AT&T · 42% of tiles
Concourse B (T4)3383,308AT&T
Concourse C (T4)2461,984Verizon
Concourse D (T4)3481,559T-Mobile
Concourse E (T3)2611,932T-Mobile
Concourse F (T3)2423,421AT&T and T-Mobile tied
Venue (on-airport)2n/a26,948n/a

User_Density = unique devices over the window, deduplicated. Tile basis. Density-weighted ranking = worst-carrier below-healthy 5G tile share × median density. A below-healthy margin under 1 point is a tie.

The density-weighted ranking multiplies each zone's worst-carrier below-healthy 5G tile share by its median density, so it points to where weak signal meets the most devices. Concourse A leads the ranking (AT&T below healthy on 42% of tiles, median density 5). The on-airport median is 2 devices per tile across 26,948 usage tiles.

Fig. 23 · Unique-device density by concourse zone · density-weighted weak-share rankingSource · Ookla
Left: median and p95 unique devices per tile by concourse zone. Right: horizontal bars ranking zones by worst-carrier weak share times median density, with Concourse A first

Unique-device density by concourse zone (median and p95 per tile) and the density-weighted weak-share ranking (tile basis). User_Density = unique devices over the window, deduplicated. Source: Ookla Cell Analytics All Networks usage export, 2025-09-01 to 2026-08-31.

Fig. 24 · Observed data volume by concourse zone and bearerSource · Ookla
Grouped bars of observed mobile and Wi-Fi data volume in gigabytes by concourse zone over the 12-month window

Observed data volume by concourse zone and bearer (GB over the 12-month window). Source: Ookla Cell Analytics All Networks usage export, 2025-09-01 to 2026-08-31.

Usage volume shows where bandwidth is consumed, by bearer and by zone. It is observed sample volume from the crowdsource panel. It is not total traffic.

Section 7

Wi-Fi as an augmentation layer

Venue and zone level only

Wi-Fi presence (a different figure from the offload share): Wi-Fi usage is observed on 60.0% of the 19,449 on-airport usage tiles that report the Wi-Fi field. A non-reporting tile means no measurement and is excluded from the denominator; it is not evidence of no Wi-Fi. The augmentation opportunity is largest where the worst-served carrier is weakest and Wi-Fi presence is high. Fig. 25 (worst-carrier healthy share vs Wi-Fi presence by zone) ships in the PDF.

7.1 Offload share (venue and zone level only)

On tiles assigned to a concourse zone, 46.5% of observed data volume moves over Wi-Fi (Σ Wi-Fi MB ÷ Σ all MB on the All Networks panel, n=14,851 tiles); over the whole clip the figure is 47.1% (n=26,948).

Scope decomposition: the 12,097 usage tiles outside every zone run 50.2% Wi-Fi. The 200 m buffer around the aerodrome captures the Sky Train stations, the Rental Car Center approach, the economy parking lots, and roadway; those are not concourse tiles, which is why the concourse-zone figure is the one on the cover.

Fig. 26 · Wi-Fi share of observed data volume by concourse zoneSource · Ookla
Bar chart of the Wi-Fi share of observed data volume per concourse zone with the venue reference line

Wi-Fi share of observed data volume by concourse zone, with the venue reference line. Source: Ookla Cell Analytics All Networks usage export, 2025-09-01 to 2026-08-31.

No per-carrier offload

Locked rule (section 16): offload is computed at venue and zone level only. The export does not attribute Wi-Fi usage to any cellular carrier's subscribers, so per-carrier offload is not derivable and not implied. The figure blends the public network with tenant, airline lounge, hotel, and personal networks.

7.2 Tenant-level Wi-Fi footprint

Wi-Fi presence and observed volume peak where passengers spend time. The public network is Free PHX Boingo WiFi, operated by Boingo Wireless under City of Phoenix contract 152010, a revenue contract covering the public areas of both terminals and the Rental Car Center; the City extended it through July 31, 2026 and then month to month while it transitions the service in house held. The Wi-Fi figures here come solely from the Ookla usage layer. Controller telemetry (section 15) would convert presence into capacity. Fig. 27 (Wi-Fi observation rate and intensity across tenant categories) ships in the PDF.

Section 8

Private wireless

CBRS · operational workloads · open items

No public record of a Citizens Broadband Radio Service, private LTE or private 5G network at the airport was located; Phoenix public safety radio runs on the Regional Wireless Cooperative P25 system, and a 2011 trade report describes a distributed antenna system built for in-building radio coverage at the airport not independently verified. The Ookla drop for this window also contained a separate three-tile export labelled with a CBRS operator; three tiles is below the 30-tile floor and it is held in the audit dossier as a count, not surfaced here. The public Ookla layer does not characterize private networks. Whether a Citizens Broadband Radio Service (CBRS) private-network layer is scoped alongside the City DAS program is a design question for the Aviation Department. AT&T's FirstNet Band 14 (LTE700PS) appears on 335 AT&T LTE tiles (section 9.1).

The two open items

Two items about the in-building layer are not held at this issue, and both are requests to the Aviation Department rather than gaps in the measurement. First, the entity awarded solicitation AVN RCS 21-008: no City Council award record, press release or vendor announcement naming the awarded entity was found. Second, the program's per-building phase map, which would say which concourses carried service on the new system during this window. Recommendation 1 asks for both. Everything measured in this report stands without them.

Typical large-hub private-network workloads:

WorkloadWhy a private network fitsCoordination required
Baggage handling system instrumentationDeterministic latency, contained RF, isolation from passenger trafficAviation Department, baggage system vendors
Ramp and ground-service vehicle telematicsOutdoor airside coverage with controlled SIM provisioningAirside operations
Push-to-talk and operational voiceGuaranteed-quality voice independent of public carriersPhoenix Police Airport Bureau, ground handlers
Fixed cameras and IoT in non-public areasBandwidth without consuming public-carrier capacityFacilities maintenance
Construction-phase connectivity (Terminal 3 and Terminal 4 program work)Coverage that survives phased construction sequencingProgram management, contractors
Section 9

Spectrum and service availability

Bands · availability
9.1 Band distribution

Legend: Ookla band labels are technology plus approximate frequency in MHz, printed verbatim from the export. For example, NR2500 and NR2600 are both 2.5 GHz spectrum, and LTE800 and NR850 are both 850 MHz cellular spectrum. LTE700PS is FirstNet Band 14, the public-safety broadband band. Cell, PCI, and band fields populate only where Ookla resolved a serving cell, so band n is smaller than RSRP n (section 16).

The bands a tile attaches to most often show which spectrum each carrier puts to work at the venue. Sub-1 GHz attachment implies coverage-grade bands. Mid-band attachment implies strong penetration or an in-building source. AT&T's 5G band mix rests on 1,366 cell-resolved tiles against its 6,179 5G-reporting tiles. LTE1800 rows are an Ookla band label as exported, not a United States band allocation. Fig. 28 (strongest-serving band distribution per carrier) ships in the PDF.

Carrier5G NR strongest band · tiles (n) · share of NR footprintLTE strongest band · tiles (n) · share of LTE footprint
T-Mobilen = 15,875 NR · 10,814 LTENR2500 10,009 (63.0%) · NR2600 3,808 (24.0%) · NR1900 1,391 (8.8%) · NR600 666 (4.2%) · NR2100 1 (0.0%)LTE1900 5,642 (52.2%) · LTE2100 4,608 (42.6%) · LTE700 253 (2.3%) · LTE600 231 (2.1%) · LTE1800 80 (0.7%)
Verizonn = 9,798 NR · 15,151 LTENR3700 7,223 (73.7%) · NR3500 1,115 (11.4%) · NR2100 725 (7.4%) · NR850 723 (7.4%) · NR1900 11 (0.1%) · NR600 1 (0.0%)LTE2100 10,858 (71.7%) · LTE800 2,334 (15.4%) · LTE700 1,916 (12.6%) · LTE1900 43 (0.3%)
AT&Tn = 1,366 NR · 12,209 LTENR3700 1,114 (81.6%) · NR3500 195 (14.3%) · NR1900 41 (3.0%) · NR850 12 (0.9%) · NR2500 2 (0.1%) · NR2100 1 (0.1%)LTE1900 4,303 (35.2%) · LTE2100 3,676 (30.1%) · LTE700 3,209 (26.3%) · LTE2300 676 (5.5%) · LTE700PS 335 (2.7%) · LTE800 10 (0.1%)

Labels are Ookla's, printed verbatim. Share = band tiles ÷ the carrier's band-reporting tile footprint (PDF Appendix B).

9.2 Service availability

Service availability is near-universal for all three carriers and is stated here rather than charted, because every value sits within three points of 100 and a chart of that adds nothing. On tiles that report the field, mean own-network availability is T-Mobile 99%, Verizon 97%, AT&T 98%, and mean general-LTE availability is T-Mobile 99%, Verizon 100%, AT&T 100%. That is the graceful-degradation floor: a device keeps a usable LTE layer almost everywhere on the campus. Basis disclosure: these fields are not populated on every tile. The own-network mean rests on T-Mobile 15,697, Verizon 16,079, AT&T 10,525 tiles and the general-LTE mean on T-Mobile 15,719, Verizon 16,088, AT&T 10,530 tiles, which is T-Mobile 83%, Verizon 87%, AT&T 82% of each carrier's on-airport tiles; the field-population table in section 16 lists every field on the same basis.

Section 10

Carrier-asymmetry atlas

Worst-carrier tally per gate

The top 20 gates by best-minus-worst carrier 5G RSRP spread are where a passenger's experience varies most by carrier (spreads of 9 to 26 dB). The best carrier across the top 20 is T-Mobile or Verizon. Worst-carrier tally across all 110 ranked gates: AT&T 49, Verizon 33, T-Mobile 28. The top five sit in Concourse B (3) and Concourse F (2). They serve two purposes: worst-case examples for the stakeholder narrative, and the validation-point list for post-deployment monitoring (section 14). A multi-carrier in-building system should compress this spread.

Gate (OSM ref)Concourse · airlines not independently verifiedWorst carrier this windowSpread this window
B·B15BConcourse B · American Airlines (B23-B28 international)AT&T25.9 dB
B·B15AConcourse B · American Airlines (B23-B28 international)AT&T20.1 dB
F·F1Concourse F · Delta and other Terminal 3 carriers (common use)AT&T15.5 dB
F·F2Concourse F · Delta and other Terminal 3 carriers (common use)AT&T14.5 dB
B·B1AConcourse B · American Airlines (B23-B28 international)AT&T13.4 dB

Spread = best minus worst carrier mean 5G RSRP at the gate. Among the 110 gates where every carrier's per-gate n is at least 30 tiles. B1A, B15A and B15B are OpenStreetMap hardstand points that are not on the published gate list (section 2.1).

Fig. 29 · Carrier-asymmetry atlas · top 20 gates by spreadSource · Ookla
Horizontal bar chart of the 20 gates with the largest best-minus-worst carrier 5G RSRP spread; bar color marks the worst carrier at each gate, mostly AT&T across Concourse B and Concourse F

Top 20 gates by best-minus-worst carrier 5G RSRP spread, among the 110 gates where every carrier's per-gate n is at least 30 tiles. Bar color is the worst carrier at that gate. Gate refs follow the OpenStreetMap inventory. Source: Ookla Cell Analytics per-carrier RF tile export, 2025-09-01 to 2026-08-31.

Fig. 30 · Worst-carrier 5G class per tile and unique-device density per tileSource · Ookla
Two terminal-area maps side by side: on the left, each tile where all three carriers report is colored by the worst carrier's 5G coverage class, with amber over the east end of Terminal 4 and the Terminal 3 concourses; on the right, unique devices per usage tile on a log color scale, densest across the concourse cores and the Sky Train stations

Left: each terminal-area tile colored by the worst carrier's 5G NR class where all three carriers report. Right: User_Density per usage tile (unique devices, deduplicated) on a log scale over the same extent. Source: Ookla Cell Analytics per-carrier RF tile export and All Networks usage export, 2025-09-01 to 2026-08-31.

Fig. 30 pairs the two questions an operator asks first: where is the weakest carrier weak, and where are the devices. Amber concentrates over the east end of Terminal 4 and the Terminal 3 concourses, and the density panel shows the concourse cores and the Sky Train stations carrying the highest unique-device counts.

Section 11

Federal and operational-critical tenants

Single-point aggregates · scope only

1 operational-critical point is identifiable by name in the pinned capture (Phoenix Police Airport Bureau); no other federal or operational-critical point is identifiable by name in the capture. AT&T's FirstNet Band 14 (LTE700PS) appears on 335 AT&T LTE tiles (section 9.1); public-safety coverage posture is a section 15 layer. These readings are single-point aggregates, reported for scope and not ranked.

PointZonePer-carrier 5G RSRP (class, n tiles)
Phoenix Police Airport BureauOutside zonesT-Mobile −93.7 dBm (healthy, n=69); Verizon −75.9 dBm (healthy, n=68); AT&T −97.0 dBm (at-risk, n=67)

One point on crowdsourced tiles is not a coverage assessment. Recommendation 5 asks for a walk test here.

Photo · Terminal 4 international arrivals baggage claim, December 2024Wikimedia Commons
Photograph of U.S. Customs and Border Protection officers directing arriving international passengers in the Terminal 4 international arrivals baggage claim area in December 2024

U.S. Customs and Border Protection officers in the Terminal 4 international arrivals baggage claim, December 2024. Photo: CBP Photography, Public domain, via Wikimedia Commons. Illustrative, resized only.

Section 12

Share of gate points below the healthy line, and why passenger exposure is not derivable

Illustrative proxy · not a measurement

Translation method: PHX recorded 25,595,723 revenue enplanements in calendar 2024 (FAA not independently verified) and 51,618,649 total passengers in 2025 (airport statistics page, both directions held); the two bases are not interchangeable and only the FAA enplanement figure belongs in any translation. Per-gate volumes are not held, so the only translation this report offers is illustrative and stays in prose: distributing annual enplanements uniformly across the 110 measured gates would place the share of gates below healthy 5G onto the same share of enplanements.

CarrierGates below healthy 5GShare of gatesGates within 1 dB of the line
(sensitivity)
T-Mobile29 of 11026.4%10
Verizon17 of 11015.5%6
AT&T22 of 11020.0%16
Illustrative proxy, kept in prose

It is not a measurement, it assigns every gate the same volume regardless of airline, and it is not tabulated for that reason. A gate-level passenger feed (section 15) would replace it. The point stands without it: T-Mobile 26.4%, Verizon 15.5% and AT&T 20.0% of gates sit below the healthy 5G threshold in this window, with T-Mobile 10, Verizon 6 and AT&T 16 of those gates within 1 dB of the line.

Section 13

Prioritized recommendations

Ordered by dependency · each with an owner
  1. Obtain the two items the public record does not hold

    The entity awarded solicitation AVN RCS 21-008, and the DAS program's per-building phase map, with the bands (LTE, 5G NR) each of AT&T, Verizon and T-Mobile carries per building and the go-live schedule through spring 2027. The measured pattern, a different least-weak carrier over each of the Terminal 3, Terminal 4 and Gates D11 to D18 footprints (section 4.7), is consistent with more than one explanation, and the answer decides what the after reading is measured against.

    Owner · City of Phoenix Aviation Department with the DAS program team
  2. Adopt this window as the baseline reading and re-measure per building as each goes live

    Section 14 lists the per-carrier, per-zone criteria. Take the weakest 5 carrier-zone cells first, all at or below 58% healthy on the tile basis: T-Mobile in Concourse D (44% of 994 tiles); Verizon in Concourse D (54% of 915 tiles); AT&T in Concourse F (57% of 767 tiles); AT&T in Concourse B (58% of 886 tiles); T-Mobile in Concourse F (58% of 2,064 tiles). They span Terminal 3 (2) and Terminal 4 (3), so those concourses carry the largest measured gap and should be sequenced first where the program schedule allows.

    Owner · Imagine Wireless with the Aviation Department
  3. Make the Gates D11 to D18 footprint the first place the programme is re-measured

    For all three carriers: it is the weakest building measured (T-Mobile 16%, Verizon 9%, AT&T 57% of tiles healthy, medians T-Mobile −102.0, Verizon −106.0, AT&T −94.0 dBm). The criteria in section 14 are indicative monitoring targets for a like-for-like re-measurement. They are NOT acceptance criteria and must not be written into a carrier agreement or a DAS acceptance document: acceptance is per-carrier commissioning by walk test and scanner survey.

    Owner · Aviation Department with the DAS program team and AT&T, Verizon and T-Mobile
  4. Treat Wi-Fi as a coexisting capacity layer in the design

    46% of observed data volume in the concourse zones rides Wi-Fi (section 7.1); that figure blends the public network with tenant, lounge, hotel and personal Wi-Fi and is not attributable to any one network. Obtain controller telemetry for the public network to size it.

    Owner · City of Phoenix Aviation Department, Wi-Fi operator
  5. Verify public-safety coverage at the Phoenix Police Airport Bureau point by walk test

    Across the three carriers the 5G readings at that single point span 21 dB (67 tiles per carrier), and the weakest of the three is AT&T, which is the FirstNet carrier. One point on crowdsourced tiles is not a coverage assessment, which is why this is a walk test rather than a finding, and emergency responder radio coverage is governed by the authority having jurisdiction and NFPA 1221, not by this instrument.

    Owner · Aviation Department with the Phoenix Police Airport Bureau and the authority having jurisdiction
  6. Decide the CBRS and private-wireless question alongside the DAS program

    Decide it alongside the program (section 8), not after it, so the DAS coverage exhibit's decommissioning clause for standalone systems is applied with the private-network plan in view.

    Owner · City of Phoenix Aviation Department
Section 14

Post-deployment monitoring criteria and re-measurement plan

Indicative · baseline-and-after · locked ladder
Indicative monitoring criteria, not acceptance criteria

These are indicative monitoring criteria for a like-for-like re-measurement. They are not the acceptance test for any system, they are not contractual, and they must not be written into a carrier agreement or a DAS acceptance document: acceptance is per-carrier commissioning by walk test and scanner survey. Every threshold below is the locked ladder from section 16 (−95.0 dBm healthy) plus this window's measured baseline recorded for comparison. This report sets no target share: a share to aim at depends on the design, and on window-to-window variation this single window cannot estimate. The baseline itself may blend served and unserved space, because which buildings carried service on the new system during the window is not held (section 8).

Gate refs and counts come from the OpenStreetMap inventory (Concourse A 28, Concourse B 30, Concourse C 16, Concourse D 16, Concourse E 10, Concourse F 10). Gate-named criteria must be reconciled against the Aviation Department's gate plan before adoption (section 2.1).

Zone, building, or pointCarrierCriterion (threshold)Re-test
All measured gatesEvery hosted carrier5G SS-RSRP median ≥ −95 dBm per gateLike-for-like window after go-live
All measured gate pointsT-MobileHealthy 5G share above this window's baseline of 74% (81 of 110 gate points); no target share is set hereLike-for-like window after go-live
Concourse AT-MobileZone tile median at or above −95.0 dBm (locked ladder); healthy share compared against this window's baseline of 60% (n=1,957)Like-for-like window after the zone's building goes live
Concourse BT-MobileZone tile median at or above −95.0 dBm (locked ladder); healthy share compared against this window's baseline of 92% (n=2,492)Like-for-like window after the zone's building goes live
Concourse CT-MobileZone tile median at or above −95.0 dBm (locked ladder); healthy share compared against this window's baseline of 77% (n=1,258)Like-for-like window after the zone's building goes live
Concourse DT-MobileZone tile median at or above −95.0 dBm (locked ladder); healthy share compared against this window's baseline of 44% (n=994)Like-for-like window after the zone's building goes live
Concourse ET-MobileZone tile median at or above −95.0 dBm (locked ladder); healthy share compared against this window's baseline of 67% (n=1,267)Like-for-like window after the zone's building goes live
Concourse FT-MobileZone tile median at or above −95.0 dBm (locked ladder); healthy share compared against this window's baseline of 58% (n=2,064)Like-for-like window after the zone's building goes live
T3: Terminal 3T-MobileMedian over the footprint at or above −95.0 dBm (locked ladder; this window −86.0 dBm); healthy share compared against this window's baseline of 92% (n=344)Like-for-like window after that building goes live
T4: Terminal 4T-MobileMedian over the footprint at or above −95.0 dBm (locked ladder; this window −90.0 dBm); healthy share compared against this window's baseline of 77% (n=546)Like-for-like window after that building goes live
T4: Gates D11-D18T-MobileMedian over the footprint at or above −95.0 dBm (locked ladder; this window −102.0 dBm); healthy share compared against this window's baseline of 16% (n=99)Like-for-like window after that building goes live
All measured gate pointsVerizonHealthy 5G share above this window's baseline of 85% (93 of 110 gate points); no target share is set hereLike-for-like window after go-live
Concourse AVerizonZone tile median at or above −95.0 dBm (locked ladder); healthy share compared against this window's baseline of 63% (n=1,865)Like-for-like window after the zone's building goes live
Concourse BVerizonZone tile median at or above −95.0 dBm (locked ladder); healthy share compared against this window's baseline of 78% (n=1,818)Like-for-like window after the zone's building goes live
Concourse CVerizonZone tile median at or above −95.0 dBm (locked ladder); healthy share compared against this window's baseline of 66% (n=1,172)Like-for-like window after the zone's building goes live
Concourse DVerizonZone tile median at or above −95.0 dBm (locked ladder); healthy share compared against this window's baseline of 54% (n=915)Like-for-like window after the zone's building goes live
Concourse EVerizonZone tile median at or above −95.0 dBm (locked ladder); healthy share compared against this window's baseline of 72% (n=1,052)Like-for-like window after the zone's building goes live
Concourse FVerizonZone tile median at or above −95.0 dBm (locked ladder); healthy share compared against this window's baseline of 75% (n=2,051)Like-for-like window after the zone's building goes live
T3: Terminal 3VerizonMedian over the footprint at or above −95.0 dBm (locked ladder; this window −90.0 dBm); healthy share compared against this window's baseline of 82% (n=333)Like-for-like window after that building goes live
T4: Terminal 4VerizonMedian over the footprint at or above −95.0 dBm (locked ladder; this window −89.0 dBm); healthy share compared against this window's baseline of 84% (n=540)Like-for-like window after that building goes live
T4: Gates D11-D18VerizonMedian over the footprint at or above −95.0 dBm (locked ladder; this window −106.0 dBm); healthy share compared against this window's baseline of 9% (n=98)Like-for-like window after that building goes live
All measured gate pointsAT&THealthy 5G share above this window's baseline of 80% (88 of 110 gate points); no target share is set hereLike-for-like window after go-live
Concourse AAT&TZone tile median at or above −95.0 dBm (locked ladder); healthy share compared against this window's baseline of 58% (n=927)Like-for-like window after the zone's building goes live
Concourse BAT&TZone tile median at or above −95.0 dBm (locked ladder); healthy share compared against this window's baseline of 58% (n=886)Like-for-like window after the zone's building goes live
Concourse CAT&TZone tile median at or above −95.0 dBm (locked ladder); healthy share compared against this window's baseline of 71% (n=480)Like-for-like window after the zone's building goes live
Concourse DAT&TZone tile median at or above −95.0 dBm (locked ladder); healthy share compared against this window's baseline of 67% (n=440)Like-for-like window after the zone's building goes live
Concourse EAT&TZone tile median at or above −95.0 dBm (locked ladder); healthy share compared against this window's baseline of 73% (n=505)Like-for-like window after the zone's building goes live
Concourse FAT&TZone tile median at or above −95.0 dBm (locked ladder); healthy share compared against this window's baseline of 57% (n=767)Like-for-like window after the zone's building goes live
T3: Terminal 3AT&TMedian over the footprint at or above −95.0 dBm (locked ladder; this window −90.0 dBm); healthy share compared against this window's baseline of 69% (n=227)Like-for-like window after that building goes live
T4: Terminal 4AT&TMedian over the footprint at or above −95.0 dBm (locked ladder; this window −91.0 dBm); healthy share compared against this window's baseline of 74% (n=412)Like-for-like window after that building goes live
T4: Gates D11-D18AT&TMedian over the footprint at or above −95.0 dBm (locked ladder; this window −94.0 dBm); healthy share compared against this window's baseline of 57% (n=68)Like-for-like window after that building goes live
Terminal 4 and Terminal 3T-MobileLTE tile median ≥ −95 dBm per zone (this window: Concourse A −98.0; Concourse B −87.0; Concourse C −92.0; Concourse D −102.0; Concourse E −90.0; Concourse F −93.0 dBm)Like-for-like window after go-live
Gate B·B15B (OSM ref)worst this window: AT&TCarrier-to-carrier spread compared against this window's 25.9 dB; a multi-carrier in-building source should compress itLike-for-like window after go-live
Gate B·B15A (OSM ref)worst this window: AT&TCarrier-to-carrier spread compared against this window's 20.1 dB; a multi-carrier in-building source should compress itLike-for-like window after go-live
Gate F·F1 (OSM ref)worst this window: AT&TCarrier-to-carrier spread compared against this window's 15.5 dB; a multi-carrier in-building source should compress itLike-for-like window after go-live
Gate F·F2 (OSM ref)worst this window: AT&TCarrier-to-carrier spread compared against this window's 14.5 dB; a multi-carrier in-building source should compress itLike-for-like window after go-live
Gate B·B1A (OSM ref)worst this window: AT&TCarrier-to-carrier spread compared against this window's 13.4 dB; a multi-carrier in-building source should compress itLike-for-like window after go-live

Re-measurement uses the same instrument as this baseline (Ookla Cell Analytics, identical thresholds). The window is like for like: the same 12-month length, or a matched shorter window that is disclosed alongside the result. Ookla's date-range comparison renders the before and after directly. Imagine Wireless re-measures over that window after any in-building change goes live; the crowdsourced tiles serve as the baseline-and-after comparison and acceptance itself is per-carrier commissioning.

Section 15

Next layers to add

Queued for the next revision
LayerWhat it resolvesSource
Ookla Site Finder centroids (LTE and 5G)Macro-site geometry behind the section 3 and 5.2 readings; this issue publishes no site figure, so those readings rest on the RF tiles alone; queued for the next issueOokla portal pull (Imagine Wireless)
DAS program inventoryThe awarded operator of solicitation AVN RCS 21-008, the per-building phase map, the bands each carrier carries per building, and the go-live schedule (Recommendation 1)City of Phoenix Aviation Department, DAS program team
Google Places tenant captureAdds admin, services, and lounge points to the OpenStreetMap list and thickens the category cellsGoogle Places (New) pull (Imagine Wireless)
Indoor maskOSM building-polygon mask shipped in this issue (section 4.7); Ookla native Indoor layer to be pinned as portal capturesOokla portal captures (Imagine Wireless)
Date-range comparisonBefore and after for each building as the DAS goes live; converts this snapshot into a trendOokla portal pull
Poor multi-network coverageVendor-ranked building-versus-carrier problem split; corroborates section 4.3Ookla portal pull
3D Z-axis view15 m vertical bands; the export is flat but the portal is notOokla portal pull
Per-gate passenger countsReplaces the section 12 uniform-distribution proxy with measured exposureAviation Department, airline schedules
Gate plan reconciliationAligns OpenStreetMap gate refs with the Aviation Department's gate list before gate-named criteria are adoptedCity of Phoenix Aviation Department
Wi-Fi controller telemetryAirtime, retries, client density; converts presence into capacityWi-Fi operator, Aviation Department
Contract records for PHXThe knowledge graph's contracts query was not available at this issue; the DAS revenue contract's award date, term, and per-building scopeImagine knowledge graph; City of Phoenix procurement record
Public-safety (NFPA 1221) coverageEmergency responder radio coverage posture; FirstNet Band 14 is present in the dataAuthority having jurisdiction, integrator
Throughput and latency seriesSection 1 engages with Ookla's published airport benchmark for PHX; the underlying Speedtest series per terminal and per carrier would pair throughput with the signal readings in this report, which carries neitherOokla portal pull (Imagine Wireless)
Walk test: jet bridges, baggage corridors, construction zonesAreas crowdsource cannot reach; the acceptance instrumentScanner survey
Section 16

Method, thresholds, confidence, and caveats

Thresholds · provenance · reproducibility
RuleValue
Measurement sourceOokla Cell Analytics per-carrier RF tile exports and the All Networks usage export for PHX, 12-month window 2025-09-01 through 2026-08-31, clipped to the KPHX aerodrome polygon (OpenStreetMap relation 8367318, largest outer ring) plus a 200 m buffer, intersected with the single export rectangle shared by all four files (latitude 33.422 to 33.4523, longitude -112.0422 to -111.9718). 50,313 on-airport RF tiles are retained from 111,616 exported; 26,948 usage tiles from 61,367. The rectangle contains the whole terminal area; only the buffered strip south of latitude 33.422 (the south side of runway 7R/25L, no terminal, no gate) lies outside it. Measurement freshness at issue is 16 days, within the platform's 90-day policy.
Tile geometry and sample basisEach RF tile is 0.0001° by 0.0001°, about 9 m by 11 m at 33.4° N. The three carrier panels cover 27,206 unique tile centroids on the airport, 8,517 of them seen by all three carriers. The export carries no per-tile scan count, so every n in this report counts tiles, not scans. The 30-tile floor guards spatial support, not scan volume. Ookla aggregates each tile from its panel over the window.
Joins and zonesTiles to gate and tenant points within an 80 m radius. Gates and gate refs come from a pinned OpenStreetMap inventory (110 gates: Concourse A 28, Concourse B 30, Concourse C 16, Concourse D 16, Concourse E 10, Concourse F 10; the concourse letter in each ref sets the zone, a ref must carry a digit, and the build checks every lettered gate against the pinned terminal footprint with a 150 m nearest-footprint fallback). The official Terminal 4 Level 3 map, revision October 2, 2022, publishes gates A1 to A30, B1 to B28 with B23 to B28 international, C1 to C9 and C11 to C19, D1 to D8, and the airport's history page adds gates D11 to D18 in the 2022 concourse; Terminal 3 publishes gates E1 to E10 in the North Concourse and F1 to F15 in the South Concourse, with the terminal total stated as 25 gates in the 2020 modernization record and as 20 in a 2025 City release that adds six more held, so gate-named criteria must be reconciled against the Aviation Department's gate plan before adoption (the reconciliation is tabulated in section 2.1). Tenants come from a pinned OpenStreetMap capture (117 points, no polygons, no Z-axis). Tile-to-zone assignment: nearest gate or tenant point within 500 m (disclosed proxy). Tenant zone attribution: the concourse of the nearest lettered gate within 400 m, and the terminal by point-in-polygon against the same footprints (disclosed proxy).
Building mask and mapsBuilding mask (section 4.7): point-in-polygon of tile centroids against the pinned OSM footprints (Terminal 3, Terminal 4, Gates D11 to D18), so it selects tiles over a building, not tiles measured inside it. Maps: equirectangular axes in degrees, north up, no basemap tiles, rebuilt from the pinned CSVs.
Central tendency and carrier orderMedian for every headline figure; means only where labeled. Carrier mapping: the export's T-Mobile US, Verizon, and AT&T US operators are printed as T-Mobile, Verizon, and AT&T. Carrier ordering throughout: strongest at the gates first (T-Mobile and Verizon, which are tied, then AT&T), asserted against the data at build time.
Threshold ladder (locked)5G NR SS-RSRP and LTE RSRP healthy ≥ −95 dBm, at risk −95 to −110, critical < −110. 5G SS-SINR healthy ≥ 10 dB, at risk 0 to 10, critical < 0. RSRQ healthy ≥ −10 dB. No venue-specified threshold was provided. Noise floor: margins under 1 dB are not rankings; every rank statement in this report prints its margin, and the T-Mobile-to-Verizon gate-median margin of 0.5 dB is reported as a tie.
Minimum-sample ruleNo chart or comparative claim ships on fewer than 30 underlying tiles or points. Only Concourse B clears the gate floor (Concourse A 28, Concourse C 16, Concourse D 16, Concourse E 10, Concourse F 10 gates do not), Terminal 3 holds 20 lettered gates, and every tenant category holds fewer than 30 points, so those tallies appear as counts with n visible and are not ranked; zone, terminal, and category comparisons run on the tile basis for one consistent basis (applied: sections 4.3 to 4.7, 5.4, 5.5, 10, 11).
Confounded statistics, not compared across carriersTwo statistics on this page mix network state with the measuring panel and are never compared across carriers. The 5G footprint share (section 3.4) counts tiles reporting a 5G reading, and a tile reports 5G only if a handset in the panel could report that carrier's 5G band, so the share mixes deployment with each carrier's mix of 5G-capable Android handsets. Cross-carrier SINR (section 3) depends on the serving band's bandwidth and on neighbour loading, and the three carriers sit on different bands here, so a cross-carrier SINR gap is not like-for-like; within a carrier, SINR across zones is a fair comparison and is used that way. PCI diversity (section 4.2) is drawn per 1,000 cell-resolved tiles because a unique count rises with sample size, and the cell-resolved samples differ by more than an order of magnitude.
Units ruleOokla User_Density is the count of unique Android devices observed per tile over the measurement window, deduplicated. It does not count simultaneous users and it does not measure time spent, and neither reading appears anywhere in this report. Wi-Fi offload = Σ Wi-Fi MB ÷ Σ (Wi-Fi + Mobile) MB by volume, computed at venue and zone level only on the All Networks panel. Per-carrier offload is not derivable from this dataset and is not implied. The offload figure cannot separate the public network from tenant or personal networks.
Sample basis and inference limitsCrowdsourced background scans from consumer Android handsets (a panel Ookla characterizes as about 3% of devices; iOS devices are not sampled), aggregated per tile over 12 months. The panel's composition differs by carrier, so cross-carrier comparisons inherit a device-population bias this export cannot correct. Supported: medians, shares, and distributions at venue, zone, gate-cluster, and tenant-category level with n disclosed. Not supported: throughput, latency, or jitter (not in this export), per-carrier Wi-Fi offload, sub-tile positioning, and floor separation. Nothing in this report is measured indoors: there is no indoor mask beyond the building-polygon selection and no Z-axis, and gate values are tiles within 80 m of a point that can straddle the apron: the measured interior share of that join is a median of 21.6% across the 110 gate points (highest 37%), which is why terminal and building leaders in this report are named only on the building-polygon basis and gate-area results are reported as counts. The window overlaps the phased installation of the City DAS program, so any building that went live inside the window blends before and after readings.
Window and freshness2025-09-01 to 2026-08-31 · issued 2026-09-16 · 16 days at issue, within the 90-day policy.
Confidence taggingAn entity fact whose source document is pinned in this build and checksummed in the verification bundle is tagged "held" inline; an entity fact this build cites without holding a copy is tagged "not independently verified" inline. Measured claims reproduce from the raw exports through the audit dossier that accompanies this report, which also records capture dates for transcribed values (concourse airline assignments) and the public source behind every entity statement. Facts from the Imagine knowledge graph are pinned in the build's source folder and tagged "Imagine knowledge graph" inline; the graph's contracts query was not available at this issue and it holds no leadership rows for PHX. The 90-day freshness policy is Imagine Wireless's reporting policy.
Population keyFor the several n printed for one carrier: all on-airport tiles (T-Mobile 18,918, Verizon 18,513, AT&T 12,882); tiles inside the terminal extent drawn on the maps (T-Mobile 7,766, Verizon 7,966, AT&T 6,106); 5G-reporting tiles (T-Mobile 17,312, Verizon 14,734, AT&T 6,179); 5G-reporting tiles inside the map extent (T-Mobile 7,210, Verizon 6,844, AT&T 3,365). Cell, PCI, and band fields are smaller still (field population table below).
CaveatsThe dataset is gate-area and public-corridor weighted; it does not cover jet-bridge interiors or baggage corridors. PCI diversity, serving-cell volatility, and band distributions are aggregate proxies, not active traces or carrier network-management data. The optimization priority index is Ookla's vendor-defined layer, reported as such. Engineering inferences about cause are labeled as inferences where they appear.
Provenance disciplineEvery numerical value in this report is computed from the cited source files at build time, or carries an inline "held" tag when its source document is pinned in the build and checksummed in the verification bundle, or an inline "not independently verified" tag when this build cites a public record without holding a copy. No value is estimated or invented. Photographs are illustrative material from Wikimedia Commons under the licenses listed in the audit dossier and in each caption; they are not measurements.
Field population

Cell, PCI, and band fields populate only where Ookla resolved a serving cell, so their n is smaller than the RSRP n for the same carrier. The table shows the number of on-airport tiles that populate each field.

FieldT-MobileVerizonAT&T
NR_SS_RSRP17,31214,7346,179
NR_Strongest_Cell15,8749,7931,365
NR_Strongest_PCI15,8759,7981,366
NR_Strongest_Band15,8759,7981,366
LTE_RSRP10,86115,15112,209
LTE_Strongest_Cell10,87215,15612,214
LTE_CQI4,2223,8754,726
Optimization_Priority8,31013,65510,462
General_LTE_Service15,71916,08810,530
All on-airport tiles18,91818,51312,882
Provenance tag legend
TagMeaning
heldAn entity fact whose source document is pinned in this build and checksummed in the verification bundle: the City of Phoenix Aviation Department page, the airport's history, facts, statistics and airline pages, the official Terminal 4 Level 3 gate map, the Terminal 3 modernization media kit, the City's cellular DAS project page, the airport Wi-Fi page, and a Phoenix Aviation Advisory Board agenda packet. It is a held fact, never a measurement.
not independently verifiedPublic record this build cites without holding a copy: FAA statistics, award studies, capital-program releases, and trade press. It may corroborate a measured finding and never originates one.
Imagine knowledge graphA fact from the pinned Imagine knowledge-graph snapshot, held in the build's source folder. The graph's contracts query was not available at this issue and it holds no leadership rows for PHX. The graph's DAS-operator line (a carrier consortium led by AT&T Mobility, 2025 to 2035) is reported as a graph record and is not asserted as the award answer.
transcribedTranscribed values with a capture date recorded in the audit dossier: concourse airline assignments, the OpenStreetMap gate and tenant capture (pinned 2026-09-16), and every photograph.
Untagged numbersMeasured. Computed from the Ookla exports at build time and reproducible from the raw exports through the audit dossier that accompanies this report.
Photo credits
PhotographAuthorLicenseDate
Terminal 4 gate hold roomFASTILYCC BY-SA 4.02023-08-11
Aerial view of Sky HarborDesignismCC02025-05-08
PHX Sky Train at the Terminal 4 stationHunter Trick (TrickHunter)CC BY-SA 4.02023-10-14
Southwest Airlines 737 on the Terminal 4 apronBeeboManCC BY 4.02025-07-21
American Airlines 737 at Terminal 4 gate B22DesignismCC02025-05-08
Terminal 4 concourse dining areaFASTILYCC BY-SA 4.02023-08-11
Alaska Air Group aircraft at Terminal 3ZiongarageCC02025-04-27
Terminal 4 international arrivals baggage claimCBP PhotographyPublic domain2024-12-11

All photographs via Wikimedia Commons; used unmodified except for resizing. Every photograph is captured 2023 or later. Photographs are illustrative material and are not measurements.

Audit trail

Every measured value on this page is transcribed from the rev-1 report, whose numbers compute from the pinned Ookla exports at build time and reproduce through the verification bundle. The audit dossier (lane-tagged claims ledger, methodology, provenance manifest, findings log) ships with the bundle. Deliverable subject to the two-lane human review gate; sign-off status accompanies this issue.

Download the full report (PDF · rev 1)
Imagine Wireless · Venue Network Intelligence
Phoenix Sky Harbor International Airport · rev 1 · 2026-09-16
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Confidential · prepared for City of Phoenix Aviation Department stakeholder review