CoverageMap

Johnstone

Cell coverage comparison in Johnstone, Scotland

GB

Based on crowdsourced speed tests and signal measurements in Johnstone, Scotland, the current snapshot reflects over 100 speed tests and shows medians of 42.1 Mbps download, 7.8 Mbps upload, and 37 ms latency.

Performance by Carrier in Johnstone

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

EE logo
Down
67.6Mbps
Up
19.9Mbps
Reliab.
10.0/ 10

12 tests conducted

View Carrier
O2 logo
Down
11.7Mbps
Up
4.6Mbps
Reliab.
2.0/ 10

24 tests conducted

View Carrier
Three logo
Down
99.2Mbps
Up
18.6Mbps
Reliab.
9.6/ 10

75 tests conducted

View Carrier
Vodafone logo
Down
34.5Mbps
Up
5.0Mbps
Reliab.
9.0/ 10

50 tests conducted

View Carrier

Performance by Carrier shows side-by-side results for the primary mobile providers measured in Johnstone. Each row reflects download, upload, latency, and reliability for that carrier.

Providers included in this comparison are Three, O2, Vodafone, EE. Per-carrier test counts are shown in the table to indicate data accuracy.

Ad

Network Performance

Get a complete view of mobile performance across Johnstone with overall benchmarks and carrier-by-carrier breakdowns. Explore median performance metrics calculated from millions of real-world, crowdsourced speed tests. Start with the Johnstone-wide snapshot to understand overall trends, then dive deeper to compare individual carriers side-by-side and see how each performs in speed, responsiveness, and availability.

Median Performance

Download

42.1Mbps

Upload

7.8Mbps

Latency

37ms

Reliability

7.4/ 10

Top Performers

Best Download: Three

99.2 Mbps

Best Upload: EE

19.9 Mbps

Best Latency: EE

35 ms

Best Reliability: EE

10.0 / 10

Based on over 100 speed tests

Network Performance aggregates all measured carriers in Johnstone 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 100 tests. Current medians are 42.1 Mbps download, 7.8 Mbps upload, and 37 ms latency.

Ad

Cell Coverage in Johnstone: FAQ

What is the best cell phone carrier in Johnstone?

Based on crowdsourced speed tests in Johnstone, Three 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 Johnstone?

We need at least 25 recent speed tests to generate reliable local metrics. If we don't have enough tests yet, the page focuses on maps and nearby locations while we keep collecting data.

What is the reliability score?

The reliability score summarizes how dependable mobile performance is in Johnstone. 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 Johnstone?

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 Johnstone?

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

View Interactive Map

Explore detailed coverage data for Johnstone on our interactive map.

Open Map

Download Our App

Test coverage at your location and contribute to our crowdsourced data.

Get the App