CoverageMap

Cell Coverage in San Juan

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Performance by Carrier in San Juan

Compare real-world download speeds, upload performance, and latency for major carriers in San Juan — based on millions of crowdsourced speed tests to help you find the fastest, most reliable network.

Claro
Down
53.3Mbps
Up
34.0Mbps
Reliab.
9.3/ 10

33 tests conducted

View Carrier
Liberty
Down
170.8Mbps
Up
24.2Mbps
Reliab.
9.7/ 10

71 tests conducted

View Carrier
T-Mobile
Down
139.5Mbps
Up
21.6Mbps
Reliab.
10.0/ 10

Over 2,700 tests conducted

View Carrier

These results compare 3 mobile carriers measured in San Juan — Claro, T-Mobile, Liberty — using median values calculated from crowdsourced speed tests. Each card shows download speed, upload speed, and reliability to give you a complete picture of real-world network performance.

Liberty delivers the fastest median download at 170.8 Mbps, making it the top performer for raw download throughput. T-Mobile ranks highest for reliability with a score of 10.0/10, reflecting consistent connection quality across tests.

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Network Performance

Based on crowdsourced speed tests and signal measurements in San Juan, Puerto Rico, get a complete view of mobile network performance with both area-wide benchmarks and carrier-by-carrier breakdowns. Explore median performance metrics from real-world tests, then compare carriers side-by-side for speed, responsiveness, and availability.

Median Performance

Download

139.0Mbps

Upload

21.7Mbps

Latency

82ms

Reliability

10.0/ 10

Top Performers

Best Download: Liberty

170.8 Mbps

Best Upload: Claro

34.0 Mbps

Best Latency: Claro

28 ms

Best Reliability: T-Mobile

10.0 / 10

Based on over 2,800 speed tests

Network Performance aggregates all measured carriers in San Juan 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 2,800 tests. Current medians are 139.0 Mbps download, 21.7 Mbps upload, and 82 ms latency.

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San Juan

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Cell Coverage in San Juan: FAQ

What is the best cell phone carrier in San Juan?

Based on crowdsourced speed tests in San Juan, Liberty 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 Juan?

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 Juan. 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 Juan?

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 Juan?

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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