Cell Coverage in Johannesburg, California
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Not enough data for Johannesburg
Showing performance data for Kern instead. We need at least 25 speed tests in Johannesburg to generate local metrics.
Performance by Carrier in Kern
Compare real-world download speeds, upload performance, and latency for major carriers in Kern — based on millions of crowdsourced speed tests to help you find the fastest, most reliable network.
Over 8,300 tests conducted
Over 37,000 tests conducted
Over 26,000 tests conducted
These results compare 3 mobile carriers measured in Kern — AT&T, T-Mobile, Verizon — 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 246.6 Mbps, making it the top performer for raw download throughput. AT&T leads in coverage, reaching 100.0% of the area based on FCC data. Verizon ranks highest for reliability with a score of 8.5/10, reflecting consistent connection quality across tests.
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Network Performance
Based on crowdsourced speed tests and signal measurements in Johannesburg, California using data from Kern, 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
Upload
Latency
Reliability
Top Performers
Best Download: T-Mobile
246.6 Mbps
Best Upload: T-Mobile
20.9 Mbps
Best Latency: Verizon
41 ms
Best Reliability: Verizon
8.5 / 10
Best Coverage: AT&T
100.0%
Coverage Snapshot
Network Performance aggregates all measured carriers in Kern 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 Johannesburg is limited, so these medians are based on data from Kern. Current medians are 164.2 Mbps download, 16.3 Mbps upload, and 51 ms latency.
Cell Phone Plans for Johannesburg
Compare wireless plans from carriers with coverage in this area.
Mint Mobile 5GB Annual
12 month term
Mint Mobile 5GB Annual
12 month term
- 5 GB Datahigh-speed, then 128Kbps
- Hotspot Included
- Unlimited Minutes
- Unlimited Texts
US Mobile 5GB
Monthly plan
US Mobile 5GB
Monthly plan
- 5 GB Datahigh-speed, then data stops
- Hotspot Included
- Unlimited Minutes
- Unlimited Texts
- Taxes & Fees Included
US Mobile Unlimited Starter Dark Star
Monthly plan
US Mobile Unlimited Starter Dark Star
Monthly plan
- Unlimited Datahigh-speed
- 20 GB Hotspot
- Unlimited Minutes
- Unlimited Texts
- Taxes & Fees Included
Visible Base
Monthly plan
Visible Base
Monthly plan
- Unlimited Datahigh-speed
- Unlimited Hotspot
- Unlimited Minutes
- Unlimited Texts
- Taxes & Fees Included
Mint Mobile Unlimited Annual
12 month term
Mint Mobile Unlimited Annual
12 month term
- Unlimited Datahigh-speed
- 20 GB Hotspot
- Unlimited Minutes
- Unlimited Texts
$15/mo first year
Visible+
Monthly plan
Visible+
Monthly plan
- Unlimited Datahigh-speed
- Unlimited Hotspot
- Unlimited Minutes
- Unlimited Texts
- Taxes & Fees Included
$30/mo for 5 years with code 5OFF5
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Cell Coverage in Johannesburg: FAQ
What is the best cell phone carrier in Johannesburg?
Why might this page show limited data for Johannesburg?
What is the reliability score?
How can I check coverage at my specific address in Johannesburg?
How can I contribute coverage data for Johannesburg?
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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