Carrierlytics City Coverage Guide

San Antonio, TX Cell Phone Coverage Map & Network Rankings (2026)

Don't overpay for a network that struggles where you actually use your phone.

Using FCC mobile coverage data across San Antonio, TX ZIP codes, Carrierlytics compares the top-performing networks and the cheapest plans that use them.



Cell phone coverage map for San Antonio, TX

Zoom in for local detail. Tap or click a colored area to see coverage and signal details. On mobile, use two fingers to move the map.

Coverage Key
Less covered More covered
Darker areas mean the carrier covers more of that location.

Map data © OpenStreetMap contributors, © CARTO. Rendered with MapLibre. FCC BDC mobile coverage processed by Carrierlytics.

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Cell phone coverage rankings by network in San Antonio, TX

#1

T-Mobile

Coverage Score 97.9
In San Antonio, TX
Overall
99.3%
4G LTE
99.3% avg. -81 dBm 4G LTE signal where 4G LTE coverage exists: avg. -81 dBm
5G
97.5% avg. -78 dBm 5G signal where 5G coverage exists: avg. -78 dBm
Fast 5G
94.6% avg. -77 dBm Fast 5G signal where Fast 5G coverage exists: avg. -77 dBm
Bexar County, TX covered 97.5%
#2

Verizon

Coverage Score 96.6
In San Antonio, TX
Overall
100.0%
4G LTE
100.0% avg. -72 dBm 4G LTE signal where 4G LTE coverage exists: avg. -72 dBm
5G
99.4% avg. -83 dBm 5G signal where 5G coverage exists: avg. -83 dBm
Fast 5G
97.4% avg. -83 dBm Fast 5G signal where Fast 5G coverage exists: avg. -83 dBm
Bexar County, TX covered 100.0%
#3

AT&T

Coverage Score 87.4
In San Antonio, TX
Overall
99.8%
4G LTE
99.8% avg. -92 dBm 4G LTE signal where 4G LTE coverage exists: avg. -92 dBm
5G
99.2% avg. -97 dBm 5G signal where 5G coverage exists: avg. -97 dBm
Fast 5G
77.9% avg. -95 dBm Fast 5G signal where Fast 5G coverage exists: avg. -95 dBm
Bexar County, TX covered 99.8%

County coverage is shown for surrounding-area context and uses land-area only coverage.

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Best phone plans for San Antonio, TX

Best phone plans on T-Mobile's network for San Antonio, TX

97.9 T-Mobile coverage score Ranked #1 in San Antonio, TX
Best family plan
79.5 Value Score

T-Mobile Better Value

Fair Value

Price
$140.01/mo for 3 lines ($46.67/line)
Data
Unlimited
Hotspot
Unlimited
View plan
See all plans on T-Mobile Compare all phone plans

Coverage by ZIP code in San Antonio, TX

ZIP code areas can extend beyond city limits, so this table is best used for local comparison around the city.

ZIP Code AT&T T-Mobile Verizon
78015 100.0% 100.0% 100.0% 81.7% 99.8% 99.8% 99.6% 91.5% 100.0% 100.0% 100.0% 94.2%
78023 98.1% 98.1% 90.6% 77.7% 86.3% 86.1% 74.4% 55.8% 99.9% 99.9% 91.6% 75.6%
78056 95.3% 95.1% 73.9% 56.9% 72.5% 72.4% 56.6% 29.9% 95.5% 95.5% 40.8% 25.9%
78073 100.0% 100.0% 100.0% 92.9% 99.6% 99.6% 99.3% 94.4% 100.0% 100.0% 99.3% 97.2%
78109 100.0% 100.0% 100.0% 79.9% 100.0% 100.0% 100.0% 98.1% 100.0% 100.0% 97.9% 93.0%
78112 100.0% 99.8% 100.0% 98.6% 99.9% 99.9% 99.4% 93.6% 100.0% 100.0% 98.9% 88.8%
78201 100.0% 100.0% 100.0% 72.5% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0%
78202 100.0% 100.0% 100.0% 95.9% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0%
78203 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0%
78204 100.0% 100.0% 100.0% 81.7% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0%
78205 100.0% 100.0% 100.0% 75.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 87.5% 87.5%
78207 100.0% 100.0% 100.0% 80.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 99.3%
78208 100.0% 100.0% 100.0% 95.5% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0%
78209 100.0% 100.0% 100.0% 75.1% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 98.6%
78210 100.0% 100.0% 100.0% 80.9% 100.0% 100.0% 79.6% 77.1% 100.0% 100.0% 100.0% 98.1%
78211 100.0% 100.0% 100.0% 79.7% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 99.5%
78212 100.0% 100.0% 100.0% 82.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0%
78213 100.0% 100.0% 99.4% 74.6% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 99.4% 96.0%
78214 100.0% 100.0% 100.0% 73.0% 100.0% 100.0% 98.3% 96.1% 100.0% 100.0% 100.0% 100.0%
78215 100.0% 100.0% 100.0% 90.5% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0%
78216 100.0% 100.0% 100.0% 71.9% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 99.3%
78217 100.0% 100.0% 100.0% 74.9% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0%
78218 100.0% 100.0% 100.0% 73.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 99.6% 94.9%
78219 100.0% 100.0% 100.0% 84.5% 100.0% 100.0% 99.4% 98.5% 100.0% 100.0% 99.7% 98.5%
78220 100.0% 100.0% 100.0% 76.2% 100.0% 100.0% 87.2% 77.4% 100.0% 100.0% 100.0% 98.8%

About The Coverage Data

Coverage and signal estimates are derived by Carrierlytics from carrier-reported data in the FCC’s National Broadband Coverage Map, last updated in June 2025. “Percent covered” shows how much of the city or ZIP code area has a carrier signal, whether weak or strong. Signal bars show the estimated average signal strength in areas of San Antonio, TX where that carrier has coverage.

If a carrier says you should have service but you do not, run a challenge test with the FCC Mobile Speed Test App. The FCC uses those results to check carrier-submitted coverage data and requires a carrier response when enough tests show a pattern of inaccurate coverage reporting.