We use cookies to allow us and selected partners to improve your experience and our advertising. By continuing to browse you consent to our use of cookies. You can understand more and change your cookies preferences here.

Coronavirus Read our latest advice
Reviews based on facts
Our rigorous tests find the facts, and our impartial reviews tell you the truth about how products perform. First month £5, then £9.99 per month, cancel anytime.
Try Which?
1 October 2020

Mobile coverage across the UK’s different regions

New data from Which? and RootMetrics uncovers the reality of 4G coverage throughout the UK. Find out which regions have the best availability and which offer the fastest average speeds.
4g mobile signal
Jon Barrow

New research by Which? and OpenSignal has found that the rest of the UK lags well behind London when it comes to having access to a 4G signal.

While 4G customers in the capital can use the speedy network 69.7% of the time, those in Wales have far more limited access and can only get 4G 35.4% of the time.

Region Average 4G availability Average 4G Speed
London 69.7% 18.8Mbps
Yorkshire & Humberside 61.3% 22.8Mbps
North East 60.3% 20.1Mbps
Northern Ireland 58.5% 23.3Mbps
North West 54.8% 20.6Mbps
South East 54.3% 21.9Mbps
West Midlands 52.3% 21.6Mbps
Scotland 50.4% 21.1Mbps
East Midlands 49.9% 22.8Mbps
East of England 48.9% 22.3Mbps
South West 45.7% 20.9Mbps
Wales 35.4% 21.7Mbps

 Yet, while phone users in London have the best chance of getting a 4G signal, the average 4G speeds that they receive are, surprisingly, the slowest in the country. Our data showed that while 4G customers in London receive an average download speed of 18.8Mbps, those in every other region achieved average speeds of at least 20Mbp. And in Northern Ireland, the region with the fastest average speed, customers managed an average of 23.3Mbps.

This result is likely due to the greater demand for 4G in the capital, which causes congestion that drags down speeds.

Mobile phone satisfaction survey - see which networks had the happiest customers in our latest survey.

The best and worst networks

As well as reviewing overall 4G speeds and availability in each area, we also compared how the four networks – EE, O2, Three and Vodafone – performed.

The regional findings backed up the results of our national coverage report, which showed that EE offered the best 4G availability across the UK as a whole. Three offered the worst overall national 4G availability. 

Our analysis

The information used in this analysis comes from a regular collaboration between Which? and coverage experts Opensignal, and is based on more than 1.4bn data readings taken from people that have downloaded the free OpenSignal app.

By tracking 260,231 devices around the clock between December 2018 and February 2019, we're able to give a definitive account of the real mobile phone user experience. We're able to accurately report on network speeds and to chart our own metric, 'availability', which looks at the proportion of time that users have a network connection.

We think that this unique availability measurement, which determines whether the network is doing its job by providing a connection where it's needed most, is far more valuable than simply reporting predicted coverage based on computer models or one-off drive-by tests.

Read more about our approach, and download the free app, on the Opensignal website.

Which network do you say is best?

Once you know which networks offer the best coverage where you live and work, you'll want to know which ones offer the best customer service and value for money. We asked 6,100 members of the public to tell us about what they love and hate about their network.

Read the results of our best mobile networks survey to find out the winners and the losers.