Carrierlytics City Coverage Guide

San Diego, 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 San Diego, CA ZIP codes, Carrierlytics compares the top-performing networks and the cheapest plans that use them.



Cell phone coverage map for San Diego, 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, © OpenMapTiles. Basemap by OpenFreeMap. Rendered with MapLibre. FCC BDC mobile coverage processed by Carrierlytics.

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Cell phone coverage rankings by network in San Diego, CA

#1

T-Mobile

Coverage Score 93.8
In San Diego, CA
Overall
96.0%
4G LTE
96.0% avg. -84 dBm 4G LTE signal where 4G LTE coverage exists: avg. -84 dBm
5G
91.7% avg. -82 dBm 5G signal where 5G coverage exists: avg. -82 dBm
Fast 5G
83.4% avg. -81 dBm Fast 5G signal where Fast 5G coverage exists: avg. -81 dBm
San Diego County, CA covered 72.2%
#2

Verizon

Coverage Score 92.6
In San Diego, CA
Overall
99.4%
4G LTE
99.3% avg. -80 dBm 4G LTE signal where 4G LTE coverage exists: avg. -80 dBm
5G
93.1% avg. -89 dBm 5G signal where 5G coverage exists: avg. -89 dBm
Fast 5G
84.5% avg. -88 dBm Fast 5G signal where Fast 5G coverage exists: avg. -88 dBm
San Diego County, CA covered 74.4%
#3

AT&T

Coverage Score 80.5
In San Diego, CA
Overall
96.5%
4G LTE
96.2% avg. -95 dBm 4G LTE signal where 4G LTE coverage exists: avg. -95 dBm
5G
91.1% avg. -102 dBm 5G signal where 5G coverage exists: avg. -102 dBm
Fast 5G
65.9% avg. -99 dBm Fast 5G signal where Fast 5G coverage exists: avg. -99 dBm
San Diego County, CA covered 72.3%

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

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Best phone plans for San Diego, CA

Best phone plans on T-Mobile's network for San Diego, CA

93.8 T-Mobile coverage score Ranked #1 in San Diego, CA
Best family plan
80.6 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 Diego, CA

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
91911 98.9% 98.9% 98.9% 79.3% 99.6% 99.6% 98.6% 96.0% 100.0% 100.0% 98.6% 94.6%
92014 99.3% 99.3% 98.6% 69.7% 99.3% 99.3% 97.9% 88.0% 100.0% 100.0% 95.8% 85.9%
92025 95.7% 95.7% 82.4% 65.9% 97.7% 97.7% 94.4% 84.1% 100.0% 100.0% 91.7% 77.5%
92027 86.3% 86.1% 56.4% 37.1% 90.7% 90.7% 80.2% 59.1% 94.9% 94.8% 70.6% 48.6%
92029 98.8% 98.6% 89.3% 64.6% 98.8% 98.8% 96.0% 86.2% 99.8% 99.8% 66.6% 52.4%
92037 100.0% 100.0% 98.8% 75.5% 98.4% 98.4% 90.1% 73.9% 100.0% 100.0% 92.1% 77.5%
92065 82.3% 82.3% 50.7% 41.2% 87.0% 86.9% 78.7% 63.4% 87.1% 86.9% 56.7% 37.3%
92067 99.8% 99.2% 91.9% 53.5% 99.2% 99.2% 94.6% 74.1% 100.0% 100.0% 80.7% 61.2%
92071 95.6% 95.4% 90.5% 65.4% 93.7% 93.7% 91.2% 80.7% 99.3% 98.5% 95.4% 86.3%
92075 100.0% 100.0% 100.0% 75.3% 100.0% 100.0% 100.0% 98.6% 100.0% 100.0% 74.0% 60.3%
92101 100.0% 100.0% 100.0% 72.3% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0%
92102 100.0% 100.0% 100.0% 80.2% 100.0% 100.0% 100.0% 99.0% 100.0% 100.0% 100.0% 100.0%
92103 96.3% 96.3% 91.4% 72.8% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 97.5% 93.8%
92104 100.0% 100.0% 100.0% 85.4% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 98.8% 98.8%
92105 99.2% 98.4% 98.4% 80.5% 100.0% 100.0% 99.2% 95.1% 100.0% 100.0% 100.0% 96.7%
92106 85.5% 85.5% 79.8% 53.2% 88.7% 88.7% 84.7% 79.8% 98.4% 98.4% 91.9% 83.1%
92107 100.0% 100.0% 100.0% 85.9% 98.4% 98.4% 92.2% 89.1% 100.0% 100.0% 96.9% 89.1%
92108 100.0% 100.0% 100.0% 88.5% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 99.0% 97.9%
92109 100.0% 99.4% 99.4% 75.1% 100.0% 100.0% 100.0% 94.7% 100.0% 100.0% 82.2% 76.3%
92110 100.0% 100.0% 100.0% 70.8% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 99.1% 98.1%
92111 100.0% 100.0% 99.5% 76.1% 100.0% 100.0% 100.0% 98.4% 100.0% 100.0% 100.0% 99.5%
92113 100.0% 100.0% 100.0% 76.8% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 99.0%
92114 100.0% 100.0% 99.4% 74.6% 100.0% 100.0% 98.3% 91.5% 100.0% 100.0% 98.9% 91.0%
92115 100.0% 100.0% 100.0% 75.4% 100.0% 100.0% 96.9% 88.5% 100.0% 100.0% 97.7% 95.4%
92116 100.0% 100.0% 97.3% 57.5% 100.0% 100.0% 98.6% 94.5% 100.0% 100.0% 95.9% 91.8%

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 2026. “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 Diego, 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.