Contra Costa
Cell coverage comparison in Contra Costa, California
Based on crowdsourced speed tests and signal measurements in Contra Costa, California, the current snapshot reflects over 15,000 speed tests and shows medians of 66.8 Mbps download, 9.3 Mbps upload, and 39 ms latency.
Performance by Carrier in Contra Costa
Explore median download speeds, upload performance, and network latency for each major mobile carrier in Contra Costa, 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 5,700 tests conducted
Over 3,000 tests conducted
Over 7,000 tests conducted
Performance by Carrier shows side-by-side results for the primary mobile providers measured in Contra Costa. 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 Contra Costa
Get a complete view of mobile network performance across Contra Costa with overall benchmarks and carrier-by-carrier breakdowns. Explore median performance metrics calculated from millions of real-world, crowdsourced speed tests. Start with the Contra Costa-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: Verizon
104.7 Mbps
Fastest Upload: Verizon
12.7 Mbps
Best Latency: Verizon
33 ms
Best Coverage: Verizon
99.2%
Coverage Snapshot
Network Performance aggregates all measured carriers in Contra Costa 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 15,000 tests. Current medians are 66.8 Mbps download, 9.3 Mbps upload, and 39 ms latency.
Cell Phone Plans Available in Contra Costa
Compare wireless plans from carriers with coverage in this area.
Helium Mobile Zero
Monthly plan
- 1 GB Data1GB cellular + 2GB Helium Wi-Fi
- No Hotspot Included
- 100 Minutes
- 300 Texts
Helium Mobile Sprout
Monthly plan
- 3 GB Datahigh-speed, then data stops
- No Hotspot Included
- Unlimited Minutes
- Unlimited Texts
Red Pocket 500MB 12 Months
12 month term
- 0.5 GB Datahigh-speed, then Unknown
- Hotspot Included
- 500 Minutes
- 500 Texts
Tello 100 Mins
Monthly plan
- No Data Included
- No Hotspot Included
- 100 Minutes
- Unlimited Texts
Tello 1GB 100 Mins
Monthly plan
- 1 GB Datahigh-speed, then data stops
- Hotspot Included
- 100 Minutes
- Unlimited Texts
Tello 2GB 100 Mins
Monthly plan
- 1 GB Datahigh-speed, then data stops
- Hotspot Included
- 100 Minutes
- Unlimited Texts
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Citys in Contra Costa
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Cell Coverage in Contra Costa: FAQ
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