Cell Coverage in Sierra City, California

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Mint Mobile

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New customers only

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Klarna Mobile

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Not enough data for Sierra City

Showing performance data for California instead. We need at least 25 speed tests in Sierra City to generate local metrics.

Performance by Carrier in California

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

AT&T logo
Down
91.8Mbps
Up
7.4Mbps
Reliab.
4.5/ 10
Cov.
0.0%

Over 320,000 tests conducted

T-Mobile logo
Down
234.7Mbps
Up
15.6Mbps
Reliab.
8.0/ 10
Cov.
2.2%

Over 470,000 tests conducted

Verizon logo
Down
130.2Mbps
Up
13.6Mbps
Reliab.
8.8/ 10
Cov.
0.0%

Over 580,000 tests conducted

These results compare 3 mobile carriers measured in CaliforniaAT&T, Verizon, T-Mobile — 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 234.7 Mbps, making it the top performer for raw download throughput. T-Mobile leads in coverage, reaching 2.2% of the area based on FCC data. Verizon ranks highest for reliability with a score of 8.8/10, reflecting consistent connection quality across tests.

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Mint Mobile

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Network Performance

Based on crowdsourced speed tests and signal measurements in Sierra City, California using data from California, get a complete view of mobile performance with 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

141.1Mbps

Upload

12.3Mbps

Latency

35ms

Reliability

7.0/ 10

Top Performers

Best Download: T-Mobile

234.7 Mbps

Best Upload: T-Mobile

15.6 Mbps

Best Latency: AT&T

31 ms

Best Reliability: Verizon

8.8 / 10

Best Coverage: T-Mobile

2.2%

Coverage Snapshot

5G1.5%
4G LTE2.2%
Based on over 1.4 million speed tests

Network Performance aggregates all measured carriers in California 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 Sierra City is limited, so these medians are based on data from California. Current medians are 141.1 Mbps download, 12.3 Mbps upload, and 35 ms latency.

Promoted Offers

Mint Mobile

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New customers only

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Cell Phone Plans for Sierra City

Compare wireless plans from carriers with coverage in this area.

Recommended PlanSponsored

Mint Mobile 5GB Annual

12 month term

T-Mobile
$15/mo
5 GB Data
Hotspot Included
Unlimited min
Unlimited texts
Recommended PlanSponsored

US Mobile 5GB

Monthly plan

AT&T
T-Mobile
Verizon
$15/mo
5 GB Data
Hotspot Included
Unlimited min
Unlimited texts
Taxes & fees included
Recommended PlanSponsored

US Mobile Unlimited Starter Dark Star

Monthly plan

AT&T
$25/mo
Unlimited Data
20 GB Hotspot
Unlimited min
Unlimited texts
Taxes & fees included
Recommended PlanSponsored

Visible Base

Monthly plan

Verizon
$25/mo
Unlimited Data
Unlimited Hotspot
Unlimited min
Unlimited texts
Taxes & fees included
Recommended PlanSponsored

Mint Mobile Unlimited Annual

12 month term

T-Mobile
$30/mo
Unlimited Data
20 GB Hotspot
Unlimited min
Unlimited texts
Limited-time offer

$15/mo first year

Recommended PlanSponsored

Visible+

Monthly plan

Verizon
$35/mo
Unlimited Data
Unlimited Hotspot
Unlimited min
Unlimited texts
Taxes & fees included
Limited-time offer

$30/mo for 5 years with code 5OFF5

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Cell Coverage in Sierra City: FAQ

What is the best cell phone carrier in Sierra City?

Based on crowdsourced speed tests in California, 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 Sierra City?

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

What is the reliability score?

The reliability score summarizes how dependable mobile performance is in California. 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 Sierra City?

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 Sierra City?

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