San Marcos
Cell coverage comparison in San Marcos, California
Based on crowdsourced speed tests and signal measurements in San Marcos, California, the current snapshot reflects over 3,000 speed tests and shows medians of 107.9 Mbps download, 13.6 Mbps upload, and 27 ms latency.
Performance by Carrier in San Marcos
Explore median download speeds, upload performance, and network latency for each major mobile carrier in San Marcos, 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.
Over 800 tests conducted
Over 1,000 tests conducted
Over 1,100 tests conducted
Performance by Carrier shows side-by-side results for the primary mobile providers measured in San Marcos. Each row reflects median download, upload, and latency for that carrier.
Providers included in this comparison are Verizon, T-Mobile, AT&T. Per-carrier test counts are shown in the table to indicate data accuracy.
Network Performance in San Marcos
Get a complete view of mobile network performance across San Marcos 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 Marcos-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
Upload
Latency
Top Performers
Fastest Download: T-Mobile
195.6 Mbps
Fastest Upload: T-Mobile
26.6 Mbps
Best Latency: AT&T
25 ms
Best Coverage: Verizon
100.0%
Coverage Snapshot
Network Performance aggregates all measured carriers in San Marcos 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 3,000 tests. Current medians are 107.9 Mbps download, 13.6 Mbps upload, and 27 ms latency.
Cell Phone Plans for San Marcos
Compare wireless plans from carriers with coverage in this area.
Red Pocket 500MB 12 Months
12 month term
- 0.5 GB Datahigh-speed, then Unknown
- Hotspot Included
- 500 Minutes
- 500 Texts
US Mobile Light Plan Annual
12 month term
- 2 GB Datahigh-speed, then data stops
- No Hotspot Included
- Unlimited Minutes
- Unlimited Texts
- Taxes & Fees Included
TextNow Weekly Unlimited
Monthly plan
- 20 GB Datahigh-speed, then data stops
- Hotspot Included
- Unlimited Minutes
- Unlimited Texts
- Taxes & Fees Included
Red Pocket Essentials Annual
12 month term
- 3 GB Datahigh-speed, then 256Kbps
- No Hotspot Included
- Unlimited Minutes
- Unlimited Texts
Red Pocket Essentials
Monthly plan
- 3 GB Datahigh-speed, then 256Kbps
- No Hotspot Included
- Unlimited Minutes
- Unlimited Texts
Red Pocket Essentials (AT&T)
Monthly plan
- 3 GB Datahigh-speed, then 256Kbps
- No Hotspot Included
- Unlimited Minutes
- Unlimited Texts
Page 1 of 14
Cell Coverage in San Marcos: FAQ
What is the best cell phone carrier in San Marcos?
Why might this page show limited data for San Marcos?
How can I check coverage at my specific address in San Marcos?
How can I contribute coverage data for San Marcos?
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