Verizon reports the widest coverage in Fremont, CA: 100% of the area outdoors, 20.1 points ahead of AT&T. 11.5% of the area is water, and the lead is bigger than that, so it holds on land too. T-Mobile is close enough behind that the top two are effectively level.
Figures are the share of Fremont's area where each carrier reports 4G LTE or 5G service to the FCC, as of December 31, 2025. The area includes water (11.5% of it), which some carriers file coverage over and others don't. A state or city figure can hide dead spots, so check your own ZIP code below.
Verizon reports 4G LTE or 5G across 100% of Fremont outdoors and 97.7% in a moving car. T-Mobile is close enough behind that the top two are effectively level.
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.
Share of Fremont'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.
Verizon's filing covers the most of Fremont. 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 reports the widest coverage in Fremont, CA: 100% of the area outdoors, 20.1 points ahead of AT&T. 11.5% of the area is water, and the lead is bigger than that, so it holds on land too. T-Mobile is close enough behind that the top two are effectively level.
Across all carriers, 98.9% of Fremont's area has 5G of at least 7/1 Mbps and 89.4% has 5G of at least 35/3 Mbps outdoors, in filings to the FCC as of December 31, 2025.
From the FCC National Broadband Map. Each carrier files where it offers mobile broadband; the FCC publishes the share of each city's area inside that filing. They are carrier-reported, not measured, so check the carrier's own map for your exact address before you switch.
See the statewide California comparison, or coverage in Los Angeles, San Diego, San Jose, San Francisco, Fresno, Sacramento, Long Beach, Oakland, Bakersfield, Anaheim, Stockton, Riverside.
