CoverageMap

Sumas

Cell coverage comparison in Sumas, Washington

US

Based on crowdsourced speed tests and signal measurements in Sumas, Washington using data from Whatcom, the current snapshot reflects over 5,000 speed tests and shows medians of 49.4 Mbps download, 10.8 Mbps upload, and 41 ms latency.

Not enough data for Sumas

Showing performance data for Whatcom instead. We need at least 25 speed tests in Sumas to generate local metrics.

Performance by Carrier in Whatcom

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

AT&T logo
Download47.2 Mbps
Upload12.2 Mbps
Latency40 ms
Coverage98.8%

Over 3,600 tests conducted

T-Mobile logo
Download89.0 Mbps
Upload10.3 Mbps
Latency48 ms
Coverage94.6%

Over 800 tests conducted

Verizon logo
Download40.3 Mbps
Upload6.4 Mbps
Latency43 ms
Coverage99.2%

Over 500 tests conducted

Performance by Carrier shows side-by-side results for the primary mobile providers measured in Whatcom. 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 Whatcom

Get a complete view of mobile network performance across Whatcom with overall benchmarks and carrier-by-carrier breakdowns. Explore median performance metrics calculated from millions of real-world, crowdsourced speed tests. Start with the Whatcom-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

49.4Mbps

Upload

10.8Mbps

Latency

41ms

Top Performers

Fastest Download: T-Mobile

89.0 Mbps

Fastest Upload: AT&T

12.2 Mbps

Best Latency: AT&T

40 ms

Best Coverage: Verizon

99.2%

Coverage Snapshot

5G92.7%
4G LTE99.2%
Based on 12 speed tests

Network Performance aggregates all measured carriers in Whatcom to provide a baseline view of typical speeds and latency in the area. Use these medians as a quick indicator of overall network quality.

Local testing in Sumas is limited, so these medians are based on data from Whatcom. Current medians are 49.4 Mbps download, 10.8 Mbps upload, and 41 ms latency.

Cell Phone Plans for Sumas

Compare wireless plans from carriers with coverage in this area.

Helium Mobile Zero

$0/mo

Monthly plan

T-Mobile
  • 1 GB Data1GB cellular + 2GB Helium Wi-Fi
  • No Hotspot Included
  • 100 Minutes
  • 300 Texts

MobileX Custom

$0/mo

Monthly plan

Verizon
  • No Data Included
  • Hotspot Included
  • Unlimited Minutes
  • Unlimited Texts

MobileX 150 Mins 150 Texts

$4.48/mo

Monthly plan

Verizon
  • No Data Included
  • No Hotspot Included
  • Unlimited Minutes
  • Unlimited Texts

Helium Mobile Sprout

$5/mo

Monthly plan

T-Mobile
  • 3 GB Datahigh-speed, then data stops
  • No Hotspot Included
  • Unlimited Minutes
  • Unlimited Texts

Red Pocket 500MB 12 Months

$5/mo

12 month term

AT&T
T-Mobile
Verizon
  • 0.5 GB Datahigh-speed, then Unknown
  • Hotspot Included
  • 500 Minutes
  • 500 Texts

Tello 100 Mins

$5/mo

Monthly plan

T-Mobile
  • No Data Included
  • No Hotspot Included
  • 100 Minutes
  • Unlimited Texts

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Cell Coverage in Sumas: FAQ

What is the best cell phone carrier in Sumas?

Based on crowdsourced speed tests in Whatcom, 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 Sumas?

We need at least 25 recent speed tests to generate reliable local metrics. Until we reach that threshold in Sumas, we show performance data for Whatcom when it is available.

How can I check coverage at my specific address in Sumas?

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 Sumas?

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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Explore detailed coverage data for Sumas on our interactive map.

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Sumas, Washington Cell Coverage | CoverageMap