Mobile Coverage Checker
Check official signal strength for all UK networks. Enter your postcode to see combined 4G and 5G coverage - indoors and outdoors - for EE, Three, O2 and Vodafone.
Data provided by Ofcom • Updated regularly
Check Coverage by Network
Select a network to see specific coverage maps and details.
How to Check Mobile Coverage in Your Area
Our mobile coverage checker uses official Ofcom coverage data to show you predicted signal strength from all four major UK networks - EE, Three, O2, and Vodafone. Since MVNOs (virtual networks) like giffgaff, VOXI, SMARTY and others use the same masts as their parent network, you'll see their coverage too.
Simply enter your postcode above and we'll show you each network's combined coverage rating - a single score that blends 4G and 5G signal across both outdoor and in-home reception. Results are colour-coded from grey (no coverage) to green (good indoors and out) so you can compare at a glance.
Understanding Your Results
Each network gets a single combined rating on a scale of 0 to 4, reflecting both outdoor and in-home reception. Here's what each level means:
- No coverage (0) - No reliable signal predicted in your area
- Patchy outdoors (1) - Variable signal outdoors only; expect dropouts and little to no reception indoors
- Good outdoors (2) - Good signal outdoors, but unreliable inside buildings
- Good outdoors, variable indoors (3) - Strong outdoors and usable indoors, though in-home signal can vary
- Good indoors & outdoors (4) - Strong, reliable coverage both outside and inside
Why Indoor and Outdoor Coverage Differ
Mobile signals weaken as they pass through walls, roofs, and glass, which is why the rating folds indoor reception into the score. A network can deliver good coverage outdoors but a weaker signal indoors, so if you mainly use your phone at home, lean towards networks rated 3 or 4. Newer buildings with energy-efficient glazing can particularly affect signal penetration.