Which mobile network has the best signal on UK mountains?

EE has the most extensive coverage in mountainous areas across the Lake District, Snowdonia, and Scottish Highlands. Vodafone comes in second and covers most major routes and summits, though you'll hit occasional dead zones. Three and O2 are the least reliable once you venture off popular trails.

Can I call 999 on any network in the mountains even if I have no signal?

Yes, your phone will attempt emergency calls using any available network, not just your own provider. However, if no networks reach where you are, you still can't make the call. You also need a SIM card in your phone for this to work.

Do I get phone signal at the top of Ben Nevis?

EE works reliably at the summit, and Vodafone gets signal most of the time. Three and O2 are hit-and-miss. The CMD Arête route tends to be a signal black hole for all networks.

staying-on-track

The Phone Signal Lottery: Which Networks Reach Which Summits

Your phone isn't a safety device until you know whether it'll work where you're going, and 'mountains have patchy coverage' is less useful than knowing Helvellyn gets three bars on EE but none on Three. The deeply unromantic business of planning connectivity before you need 999.

20 July 20269 min read