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Cell Coverage in San Juan
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
DownDownload
50.3Mbps
UpUpload
20.8Mbps
Reliab.Reliability
10.0/ 10
Over 100 tests conducted
Liberty
DownDownload
60.3Mbps
UpUpload
29.3Mbps
Reliab.Reliability
10.0/ 10
Over 100 tests conducted
T-Mobile
DownDownload
185.8Mbps
UpUpload
25.0Mbps
Reliab.Reliability
10.0/ 10
Over 3,200 tests conducted
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.
T-Mobile delivers the fastest median download at 185.8 Mbps, making it the top performer for raw download throughput. Claro 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
152.3Mbps
Upload
25.0Mbps
Latency
76ms
Reliability
10.0/ 10
Top Performers
Best Download: T-Mobile
185.8 Mbps
Best Upload: Liberty
29.3 Mbps
Best Latency: Claro
65 ms
Best Reliability: Claro
10.0 / 10
Based on over 3,400 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 3,400 tests. Current medians are 152.3 Mbps download, 25.0 Mbps upload, and 76 ms latency.
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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, 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 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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