CALIFORNIA · STATEWIDE · FCC DATA

Best cell phone coverage in California California, statewide · AT&T · T-Mobile · Verizon

Verizon reports the widest coverage in California: 64.3% of the area outdoors, 12.9 points ahead of T-Mobile. AT&T is close enough behind that the top two are effectively level.

Figures are the share of California's area where each carrier reports 4G LTE or 5G service to the FCC, as of December 31, 2025. A state or city figure can hide dead spots, so check your own ZIP code below.

RESULT · CALIFORNIA

Coverage in California

FCC filings as of December 31, 2025

★ WIDEST REPORTED COVERAGE
Verizon
64.3%

Verizon reports 4G LTE or 5G across 64.3% of California outdoors and 33.6% in a moving car. AT&T is close enough behind that the top two are effectively level.

Outdoor
64.3%
In car
33.6%

AT&T vs T-Mobile vs Verizon in California

#1
Verizon
Reported coverage, % of area
Outdoor
64.3%
In car
33.6%
#2
AT&T
Reported coverage, % of area
Outdoor
57.3%
In car
36.2%
#3
T-Mobile
Reported coverage, % of area
Outdoor
51.4%
In car
26.8%

Outdoor is the share of the area where the carrier reports 4G LTE or 5G to a phone standing still outdoors; in car is the share it reports to a phone in a moving vehicle, which is always lower. Indoor signal is not part of the FCC filing and can be weaker than either.

4G and 5G across all carriers in California

4G LTE
72.2%
5G 7/1
56.2%
5G 35/3
47.7%

Share of California's area where at least one carrier reports each technology outdoors. "5G 7/1" means 5G of at least 7 Mbps down and 1 Mbps up, "5G 35/3" at least 35/3 Mbps, the two speed tiers the FCC publishes. The FCC summary does not split 5G by carrier.

Checking Verizon for your address

Verizon's filing covers the most of California. A cheaper plan on a carrier that doesn't reach your street costs more than it saves, so start from coverage and pick the plan second. Every carrier's own map lets you check a street address.

Verizon coverage map → AT&T coverage map → T-Mobile coverage map →

Coverage in California's largest cities

Other states