CoverageMap

San Jose

Cell coverage comparison in San Jose, California

US

Based on crowdsourced speed tests and signal measurements in San Jose, California, the current snapshot reflects over 10,000 speed tests and shows medians of 107.1 Mbps download, 16.8 Mbps upload, and 31 ms latency.

Performance by Carrier in San Jose

Explore median download speeds, upload performance, and network latency for each major mobile carrier in San Jose, calculated from millions of real-world, crowdsourced speed tests. These results reflect typical everyday performance to help you compare carriers and choose the network that delivers the fastest speeds, most responsive connections, and broadest coverage where you live, work, and travel.

AT&T logo
Down
63.2Mbps
Up
22.6Mbps
Reliab.
8.6/ 10
Cov.
87.0%

Over 2,800 tests conducted

View CarrierSee Plans
T-Mobile logo
Down
234.0Mbps
Up
20.5Mbps
Reliab.
8.9/ 10
Cov.
88.2%

Over 3,000 tests conducted

View CarrierSee Plans
Verizon logo
Down
113.9Mbps
Up
12.3Mbps
Reliab.
8.7/ 10
Cov.
95.7%

Over 4,600 tests conducted

View CarrierSee Plans

Performance by Carrier shows side-by-side results for the primary mobile providers measured in San Jose. Each row reflects download, upload, latency, and reliability for that carrier.

Providers included in this comparison are AT&T, T-Mobile, Verizon. Per-carrier test counts are shown in the table to indicate data accuracy.

Promoted Offers

Mint Mobile

$500 off Galaxy S26 series, plus 1 year of unlimited for $15/mo

New customers only

See Deal
Visible

Join Visible and get unlimited data for only $20/mo

Use code FRESHSTART to save $5 off any Visible plan

See Deal

Network Performance

Get a complete view of mobile performance across San Jose with overall benchmarks and carrier-by-carrier breakdowns. Explore median performance metrics calculated from millions of real-world, crowdsourced speed tests. Start with the San Jose-wide snapshot to understand overall trends, then dive deeper to compare individual carriers side-by-side and see how each performs in speed, responsiveness, and availability.

Median Performance

Download

107.1Mbps

Upload

16.8Mbps

Latency

31ms

Reliability

8.7/ 10

Top Performers

Best Download: T-Mobile

234.0 Mbps

Best Upload: AT&T

22.6 Mbps

Best Latency: AT&T

28 ms

Best Reliability: T-Mobile

8.9 / 10

Best Coverage: Verizon

95.7%

Coverage Snapshot

5G85.5%
4G LTE95.7%
Based on over 10,000 speed tests

Network Performance aggregates all measured carriers in San Jose to provide a baseline view of typical speeds and latency in the area. Use these medians as a quick indicator of overall network quality.

These medians are calculated from over 10,000 tests. Current medians are 107.1 Mbps download, 16.8 Mbps upload, and 31 ms latency.

Promoted Offers

Mint Mobile

$500 off Galaxy S26 series, plus 1 year of unlimited for $15/mo

New customers only

See Deal
Visible

Join Visible and get unlimited data for only $20/mo

Use code FRESHSTART to save $5 off any Visible plan

See Deal

Cell Phone Plans for San Jose

Compare wireless plans from carriers with coverage in this area.

Recommended PlanSponsored

Mint Mobile 5GB Annual

12 month term

T-Mobile
$15/mo
5 GB Data
Hotspot Included
Unlimited min
Unlimited texts
View Plan
Recommended PlanSponsored

US Mobile 5GB

Monthly plan

AT&T
T-Mobile
Verizon
$15/mo
5 GB Data
Hotspot Included
Unlimited min
Unlimited texts
Taxes & fees included
View Plan
Recommended PlanSponsored

US Mobile Unlimited Starter Dark Star

Monthly plan

AT&T
$25/mo
Unlimited Data
20 GB Hotspot
Unlimited min
Unlimited texts
Taxes & fees included
View Plan
Recommended PlanSponsored

Visible Base

Monthly plan

Verizon
$25/mo
Unlimited Data
Unlimited Hotspot
Unlimited min
Unlimited texts
Taxes & fees included
View Plan
Recommended PlanSponsored

Mint Mobile Unlimited Annual

12 month term

T-Mobile
$30/mo
Unlimited Data
20 GB Hotspot
Unlimited min
Unlimited texts
Limited-time offer

$15/mo first year

View Plan
Recommended PlanSponsored

Visible+

Monthly plan

Verizon
$35/mo
Unlimited Data
Unlimited Hotspot
Unlimited min
Unlimited texts
Taxes & fees included
Limited-time offer

$30/mo for 5 years with code 5OFF5

View Plan

Page 1 of 47

Browse all cell phone plans

Cell Coverage in San Jose: FAQ

What is the best cell phone carrier in San Jose?

Based on crowdsourced speed tests in San Jose, T-Mobile currently leads in median download speeds. Compare carriers in the performance table above for the latest results.

Why might this page show limited data for San Jose?

We need at least 25 recent speed tests to generate reliable local metrics. If we don't have enough tests yet, the page focuses on maps and nearby locations while we keep collecting data.

What is the reliability score?

The reliability score summarizes how dependable mobile performance is in San Jose. It uses a 0.0 to 10.0 scale (higher is better) and is calculated from real-world speed test percentiles with weighted components: download (50%), latency (30%), and upload (20%). It evaluates the lower-end experience using the bottom 10%, 5%, and 1% percentiles when enough samples are available. If local speed testing is limited, a coverage-based fallback is used from signal quality distribution (great/good/poor).

How can I check coverage at my specific address in San Jose?

Use the interactive map to check signal strength at your exact address. Visit the CoverageMap interactive map to explore 4G/5G availability.

How can I contribute coverage data for San Jose?

Download the CoverageMap app and run a few speed tests with location enabled. Your results help improve coverage accuracy and unlock local rankings faster.

Get the app

View Interactive Map

Explore detailed coverage data for San Jose on our interactive map.

Open Map

Download Our App

Test coverage at your location and contribute to our crowdsourced data.

Get the App