San Sebastián

Cell coverage comparison in San Sebastián, Puerto Rico

Based on crowdsourced speed tests and signal measurements in San Sebastián, Puerto Rico, the current snapshot reflects 60 speed tests and shows medians of 186.5 Mbps download, 4.3 Mbps upload, and 93 ms latency.

Performance by Carrier in San Sebastián

Explore median download speeds, upload performance, and network latency for each major mobile carrier in San Sebastián, 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.

Claro

DownDownloadNo data

UpUploadNo data

Reliab.ReliabilityNo data

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Liberty

DownDownload14.0 Mbps

UpUpload0.0 Mbps

Reliab.Reliability0.0 / 10

Less than 10 tests conducted

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T-Mobile

DownDownload193.8 Mbps

UpUpload4.4 Mbps

Reliab.Reliability8.9 / 10

59 tests conducted

View Carrier

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

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

Network Performance in San Sebastián

Get a complete view of mobile network performance across San Sebastián 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 Sebastián-wide snapshot to understand overall network trends, then dive deeper to compare individual carriers side-by-side and see how each performs in speed, responsiveness, and availability.

Median Performance

Download

186.5Mbps

Upload

4.3Mbps

Latency

93ms

Reliability

8.6/ 10

Top Performers

Best Download: T-Mobile

193.8 Mbps

Best Upload: T-Mobile

4.4 Mbps

Best Latency: Liberty

48 ms

Best Reliability: T-Mobile

8.9 / 10

Based on 60 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 60 tests. Current medians are 186.5 Mbps download, 4.3 Mbps upload, and 93 ms latency.

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Select one of the cities to view coverage data for that area.

San Sebastian

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.

Get the app

Check Coverage at Your Exact Location

Use our interactive coverage map to see detailed signal strength data for any address in San Sebastián.

Open Interactive Map