San Joaquin County, CA Cell Phone Coverage Map & Network Rankings (2026)

Find the best cell phone network and plan to use in San Joaquin County, CA

Coverage rankings for San Joaquin County, CA

T-Mobile currently ranks first for coverage in this area, with a coverage score of 92.8. Compare Wireless Carriers uses FCC broadband map data to estimate and calculate coverage scores. More on that further below.

RankCarrierScoreOverall4G LTE5GFast 5GAverage Signal
1T-Mobile92.895.4%95.4%91.2%79.4% -87 dBm
2Verizon88.196.3%96.3%83.1%61.0% -90 dBm
3AT&T82.696.6%96.3%91.6%50.6% -108 dBm

Scores include coverage area, network type, and average signal strength.

Cell phone coverage map for San Joaquin County, CA

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 Compare Wireless Carriers.

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Cell phone coverage by network in San Joaquin County, CA

#1

T-Mobile

Coverage Score 92.8
In San Joaquin County, CA
Overall
95.4%
4G LTE
95.4%
5G
91.2%
Fast 5G
79.4%
Average Signal -87 dBm
#2

Verizon

Coverage Score 88.1
In San Joaquin County, CA
Overall
96.3%
4G LTE
96.3%
5G
83.1%
Fast 5G
61.0%
Average Signal -90 dBm
#3

AT&T

Coverage Score 82.6
In San Joaquin County, CA
Overall
96.6%
4G LTE
96.3%
5G
91.6%
Fast 5G
50.6%
Average Signal -108 dBm
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Coverage by city in San Joaquin County, CA

Cities and towns are shown for county-level comparison. Coverage percentages use land-area only coverage.

CityVerizonAT&TT-Mobile
Acampo, CA 100.0% 100.0% 95.7% 87.0% -90 dBm 100.0% 100.0% 100.0% 69.6% -107 dBm 100.0% 100.0% 95.7% 95.7% -89 dBm
August, CA 100.0% 100.0% 100.0% 100.0% -70 dBm 100.0% 100.0% 100.0% 63.3% -98 dBm 100.0% 100.0% 100.0% 100.0% -77 dBm
Clements, CA 99.9% 99.9% 80.7% 32.7% -96 dBm 99.1% 99.0% 93.9% 36.1% -110 dBm 99.2% 99.2% 99.1% 88.0% -85 dBm
Collierville, CA 100.0% 100.0% 96.2% 78.8% -91 dBm 100.0% 99.4% 98.7% 88.5% -100 dBm 100.0% 100.0% 100.0% 100.0% -74 dBm
Country Club, CA 100.0% 100.0% 100.0% 95.6% -78 dBm 100.0% 100.0% 100.0% 66.7% -98 dBm 100.0% 100.0% 100.0% 100.0% -77 dBm
Dogtown, CA 100.0% 100.0% 99.3% 85.2% -90 dBm 97.7% 89.8% 94.4% 54.8% -112 dBm 100.0% 100.0% 100.0% 100.0% -88 dBm
Escalon, CA 100.0% 100.0% 98.0% 86.0% -84 dBm 100.0% 100.0% 100.0% 98.0% -96 dBm 100.0% 100.0% 100.0% 100.0% -68 dBm
Farmington, CA 100.0% 100.0% 94.8% 87.9% -84 dBm 100.0% 100.0% 93.1% 25.9% -116 dBm 100.0% 100.0% 100.0% 100.0% -81 dBm
French Camp, CA 100.0% 100.0% 97.3% 86.3% -89 dBm 100.0% 100.0% 100.0% 83.6% -92 dBm 100.0% 100.0% 100.0% 100.0% -75 dBm
Garden Acres, CA 100.0% 100.0% 98.4% 83.9% -85 dBm 100.0% 100.0% 100.0% 54.8% -101 dBm 100.0% 100.0% 100.0% 100.0% -74 dBm
Holt, CA 100.0% 100.0% 82.3% 57.6% -89 dBm 100.0% 99.7% 99.8% 57.0% -108 dBm 99.9% 99.9% 99.7% 92.7% -87 dBm
Kennedy, CA 100.0% 100.0% 100.0% 100.0% -74 dBm 100.0% 100.0% 100.0% 71.4% -103 dBm 100.0% 100.0% 100.0% 100.0% -74 dBm
Lathrop, CA 100.0% 100.0% 98.3% 95.2% -81 dBm 100.0% 100.0% 100.0% 96.7% -97 dBm 99.8% 99.8% 99.8% 91.5% -84 dBm
Lincoln Village, CA 100.0% 100.0% 100.0% 76.5% -86 dBm 100.0% 100.0% 100.0% 58.8% -101 dBm 100.0% 100.0% 100.0% 100.0% -75 dBm
Linden, CA 100.0% 100.0% 84.9% 66.3% -89 dBm 100.0% 100.0% 100.0% 82.6% -97 dBm 100.0% 100.0% 100.0% 91.3% -84 dBm
Lockeford, CA 100.0% 100.0% 82.4% 67.3% -88 dBm 100.0% 100.0% 100.0% 71.4% -101 dBm 100.0% 100.0% 100.0% 100.0% -75 dBm
Lodi, CA 100.0% 100.0% 97.6% 92.0% -82 dBm 100.0% 100.0% 100.0% 76.5% -95 dBm 100.0% 100.0% 95.4% 87.2% -84 dBm
Manteca, CA 100.0% 100.0% 99.4% 94.5% -81 dBm 100.0% 100.0% 100.0% 76.9% -100 dBm 100.0% 100.0% 100.0% 98.7% -81 dBm
Morada, CA 100.0% 100.0% 84.9% 68.5% -87 dBm 100.0% 100.0% 100.0% 56.2% -101 dBm 100.0% 100.0% 100.0% 100.0% -87 dBm
Mountain House, CA 100.0% 100.0% 99.4% 89.5% -85 dBm 100.0% 100.0% 100.0% 70.9% -102 dBm 100.0% 100.0% 100.0% 100.0% -78 dBm
Peters, CA 100.0% 100.0% 90.0% 75.0% -94 dBm 100.0% 100.0% 100.0% 55.0% -115 dBm 100.0% 100.0% 100.0% 100.0% -81 dBm
Ripon, CA 100.0% 100.0% 88.0% 64.0% -88 dBm 100.0% 100.0% 100.0% 76.0% -98 dBm 100.0% 100.0% 100.0% 100.0% -81 dBm
Stockton, CA 100.0% 100.0% 97.3% 86.4% -84 dBm 100.0% 100.0% 99.6% 72.2% -100 dBm 100.0% 99.9% 98.9% 94.2% -80 dBm
Taft Mosswood, CA 100.0% 100.0% 100.0% 100.0% -69 dBm 100.0% 100.0% 88.9% 55.6% -97 dBm 100.0% 100.0% 100.0% 100.0% -79 dBm
Terminous, CA 100.0% 100.0% 100.0% 95.7% -76 dBm 100.0% 100.0% 100.0% 13.0% -117 dBm 100.0% 100.0% 87.0% 34.8% -97 dBm
Thornton, CA 100.0% 100.0% 86.3% 64.7% -87 dBm 100.0% 100.0% 100.0% 80.4% -108 dBm 100.0% 100.0% 100.0% 94.1% -83 dBm
Tracy, CA 100.0% 100.0% 97.7% 85.6% -84 dBm 100.0% 100.0% 100.0% 69.3% -98 dBm 100.0% 100.0% 100.0% 100.0% -81 dBm
Victor, CA 100.0% 100.0% 100.0% 31.3% -97 dBm 100.0% 100.0% 100.0% 53.1% -103 dBm 100.0% 100.0% 100.0% 100.0% -86 dBm
Waterloo, CA 100.0% 100.0% 93.1% 77.9% -90 dBm 100.0% 100.0% 100.0% 66.4% -103 dBm 100.0% 100.0% 100.0% 87.8% -92 dBm
Woodbridge, CA 100.0% 100.0% 91.7% 66.7% -94 dBm 98.6% 98.6% 94.4% 69.4% -105 dBm 100.0% 100.0% 65.3% 37.5% -94 dBm
Camanche Village, CA 100.0% 100.0% 61.9% 0.0% -103 dBm 100.0% 100.0% 93.7% 61.1% -110 dBm 100.0% 100.0% 100.0% 100.0% -76 dBm
Galt, CA 100.0% 100.0% 90.4% 67.9% -90 dBm 100.0% 100.0% 100.0% 96.8% -93 dBm 100.0% 100.0% 100.0% 98.9% -84 dBm
Valley Home, CA 100.0% 100.0% 100.0% 88.0% -90 dBm 100.0% 100.0% 100.0% 36.0% -113 dBm 100.0% 100.0% 100.0% 100.0% -86 dBm
Wallace, CA 100.0% 100.0% 57.8% 6.4% -103 dBm 81.7% 81.7% 64.2% 12.8% -118 dBm 98.2% 98.2% 95.4% 68.8% -91 dBm

About The Coverage Data

Coverage and signal estimates are derived by Compare Wireless Carriers 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 Joaquin County, CA 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.