Cell Coverage in San Sebastián

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Performance by Carrier in San Sebastián

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

Claro
Down
No data
Up
No data
Reliab.
No data
View Carrier
Liberty
Down
11.0Mbps
Up
0.1Mbps
Reliab.
0.0/ 10

Less than 10 tests conducted

View Carrier
T-Mobile
Down
193.8Mbps
Up
4.4Mbps
Reliab.
8.9/ 10

59 tests conducted

View Carrier

These results compare 3 mobile carriers measured in San Sebastián — 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 193.8 Mbps, making it the top performer for raw download throughput. T-Mobile ranks highest for reliability with a score of 8.9/10, reflecting consistent connection quality across tests.

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Network Performance

Based on crowdsourced speed tests and signal measurements in San Sebastián, 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

179.2Mbps

Upload

4.2Mbps

Latency

93ms

Reliability

8.5/ 10

Top Performers

Best Download: T-Mobile

193.8 Mbps

Best Upload: T-Mobile

4.4 Mbps

Best Latency: Liberty

57 ms

Best Reliability: T-Mobile

8.9 / 10

Based on 61 speed tests

Network Performance aggregates all measured carriers in San Sebastián 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 61 tests. Current medians are 179.2 Mbps download, 4.2 Mbps upload, and 93 ms latency.

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San Sebastian

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Cell Coverage in San Sebastián: FAQ

What is the best cell phone carrier in San Sebastián?

Based on crowdsourced speed tests in San Sebastián, 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 Sebastián?

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 Sebastián. 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 Sebastián?

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 Sebastián?

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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