Chula Vista, CA 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 Chula Vista, CA zip codes, this guide compares the top-performing networks and the cheapest plans that use them.

Coverage rankings for Chula Vista, CA

T-Mobile currently ranks first for coverage in this area, with a coverage score of 97.9. Compare Wireless Carriers uses FCC broadband map data to estimate and calculate coverage scores. More on that further below.


RankCarrierScoreOverall4G LTE5GFast 5GAverage Signal
1T-Mobile97.998.6%98.6%96.6%92.9% -80 dBm
2Verizon95.7100.0%100.0%93.0%85.1% -90 dBm
3AT&T90.697.9%97.7%95.9%76.4% -101 dBm

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


Cell phone coverage map for Chula Vista, 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 Chula Vista, CA

#1

T-Mobile

Coverage Score 97.9
In Chula Vista, CA
Overall
98.6%
4G LTE
98.6%
5G
96.6%
Fast 5G
92.9%
Average Signal -80 dBm
San Diego County, CA covered 71.7%
#2

Verizon

Coverage Score 95.7
In Chula Vista, CA
Overall
100.0%
4G LTE
100.0%
5G
93.0%
Fast 5G
85.1%
Average Signal -90 dBm
San Diego County, CA covered 77.7%
#3

AT&T

Coverage Score 90.6
In Chula Vista, CA
Overall
97.9%
4G LTE
97.7%
5G
95.9%
Fast 5G
76.4%
Average Signal -101 dBm
San Diego County, CA covered 73.4%

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

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Coverage by ZIP code in Chula Vista, CA

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

ZIP CodeAT&TT-MobileVerizon
91902 99.6% 99.6% 98.3% 74.3% -103 dBm 100.0% 100.0% 100.0% 97.5% -82 dBm 100.0% 100.0% 97.9% 92.1% -91 dBm
91910 98.6% 98.6% 97.1% 74.0% -99 dBm 99.3% 99.3% 98.9% 98.2% -78 dBm 100.0% 100.0% 95.3% 91.3% -87 dBm
91911 98.9% 98.6% 98.9% 82.2% -100 dBm 100.0% 100.0% 98.6% 97.1% -77 dBm 100.0% 100.0% 99.6% 98.9% -86 dBm
91913 96.0% 95.5% 92.4% 68.2% -104 dBm 98.0% 98.0% 95.5% 85.4% -84 dBm 100.0% 100.0% 95.5% 83.3% -93 dBm
91914 100.0% 100.0% 97.9% 69.9% -104 dBm 99.3% 99.3% 98.6% 96.6% -83 dBm 100.0% 100.0% 87.7% 74.7% -97 dBm
91915 95.8% 95.8% 92.8% 80.1% -104 dBm 96.4% 96.4% 92.2% 86.1% -84 dBm 100.0% 100.0% 83.7% 66.9% -90 dBm
91950 99.4% 99.4% 99.4% 87.5% -95 dBm 99.4% 99.4% 99.4% 97.5% -76 dBm 100.0% 100.0% 100.0% 98.1% -86 dBm
92154 93.3% 92.2% 84.8% 63.1% -107 dBm 91.3% 91.3% 70.1% 53.6% -90 dBm 97.3% 96.8% 82.0% 59.6% -98 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 Chula Vista, 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.