CoverageMap

San Diego

Cell coverage comparison in San Diego, California

US

Based on crowdsourced speed tests and signal measurements in San Diego, California, the current snapshot reflects over 16,000 speed tests and shows medians of 146.6 Mbps download, 13.7 Mbps upload, and 36 ms latency.

Performance by Carrier in San Diego

Explore median download speeds, upload performance, and network latency for each major mobile carrier in San Diego, 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
104.2Mbps
Up
10.7Mbps
Reliab.
8.5/ 10
Cov.
98.5%

Over 3,600 tests conducted

View CarrierSee Plans
T-Mobile logo
Down
179.7Mbps
Up
16.1Mbps
Reliab.
7.5/ 10
Cov.
99.1%

Over 5,900 tests conducted

View CarrierSee Plans
Verizon logo
Down
162.5Mbps
Up
14.1Mbps
Reliab.
8.8/ 10
Cov.
99.9%

Over 6,600 tests conducted

View CarrierSee Plans

Performance by Carrier shows side-by-side results for the primary mobile providers measured in San Diego. 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

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Regular price $25/month for 3 months

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Network Performance

Get a complete view of mobile performance across San Diego 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 Diego-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

146.6Mbps

Upload

13.7Mbps

Latency

36ms

Reliability

8.7/ 10

Top Performers

Best Download: T-Mobile

179.7 Mbps

Best Upload: T-Mobile

16.1 Mbps

Best Latency: AT&T

31 ms

Best Reliability: Verizon

8.8 / 10

Best Coverage: Verizon

99.9%

Coverage Snapshot

5G99.1%
4G LTE100.0%
Based on over 16,000 speed tests

Network Performance aggregates all measured carriers in San Diego 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 16,000 tests. Current medians are 146.6 Mbps download, 13.7 Mbps upload, and 36 ms latency.

Promoted Offers

Mint Mobile

Get the 5GB plan for $10/mo for your first 3 months

Regular price $25/month for 3 months

See Deal
Visible

Get Visible+ for $30/mo with code 5OFF5

Get $5 off for up to 5 years. New customers only.

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Cell Phone Plans for San Diego

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

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Cell Coverage in San Diego: FAQ

What is the best cell phone carrier in San Diego?

Based on crowdsourced speed tests in San Diego, 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 Diego?

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 Diego. 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 Diego?

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 Diego?

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

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View Interactive Map

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

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

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