Mobile Signal by Postcode: Check Coverage in Your Area (2026)
Despite significant investment, around 9% of the UK landmass still lacks reliable 4G coverage from all four major operators. Rural areas, valleys, and some coastal regions are worst affected. Enter any postcode to check which networks offer strong signal at your location, including 4G and 5G availability.
Our mobile coverage data comes from Ofcom's coverage data for EE, Three, Vodafone, and O2.
UK network coverage at a glance
91% 4G
Best rural coverage
88% 4G
Best value 5G
87% 4G
Strong in cities
86% 4G
Reliable indoor signal
National averages shown above. Enter your postcode at the top of the page for coverage at your exact location.
Signal and broadband for the home you're moving to
National coverage maps show what's available across an area. The free address report shows Ofcom mobile coverage and broadband for the property's full postcode, alongside its EPC rating, flood zone and crime nearby.
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Which network is best for you?
Coverage varies by location. Enter your postcode above to check your specific area. Here is how the four networks compare by use case:
Best rural coverage
91% UK landmass. Best choice if you live outside cities, travel frequently, or are in a valley or coastal area.
Best value 5G
88% 4G, 450+ towns with 5G. Cheapest 5G SIM deals. Best if you are in a city and want fast data at low cost.
Best indoor signal
86% 4G, strongest indoor penetration. Best if your home has thick walls, low-e glass, or modern insulation blocking signal.
Strong in cities
87% 4G, 400+ towns with 5G. Reliable urban coverage with competitive roaming. Good if you travel internationally.
UK Mobile Operators at a Glance
National coverage figures for the four major UK mobile networks. Enter your postcode above for location-specific results.
4G: 91%
5G: 500+ towns
Best rural coverage
4G: 88%
5G: 450+ towns
Best value 5G
4G: 87%
5G: 400+ towns
Strong in cities
4G: 86%
5G: 350+ towns
Reliable indoor signal
What You Will Find in Your Report
Every PostcodeCheck area report includes mobile coverage data, helping you understand connectivity before you move.
4G Coverage
Whether 4G LTE is available outdoors and indoors at your postcode for all four major networks.
5G Availability
Which operators offer 5G data at your postcode.
Indoor Signal
Whether each network's 4G is predicted to work indoors, where signal is usually weaker than outdoors.
Network Comparison
Side-by-side coverage comparison for EE, Three, Vodafone, and O2.
Connectivity Sub-Score
Mobile coverage contributes to the connectivity sub-score in your Area Score.
Broadband Speeds
Ofcom broadband speeds for the same postcode, useful if you plan to rely on Wi-Fi calling.
What Affects Mobile Signal
Mobile signal strength depends on several factors that can vary even between houses on the same street. The most significant factor is distance from the nearest cell tower: signal weakens with distance following an inverse square law. Terrain matters too; hills, valleys, and dense woodland can block or scatter radio signals.
Building materials play a crucial role in indoor signal quality. Traditional brick and plaster walls attenuate signal by about 5-10 dB, while modern construction materials like foil-backed insulation, metal cladding, and low-emissivity glass can reduce signal by 20 dB or more. This means a home with full 4G signal outside could have barely usable signal inside.
The number of users sharing a local cell tower also affects performance. In densely populated areas, especially during peak hours, available bandwidth is shared among more users, reducing individual speeds. This is particularly noticeable at large events, transport hubs, and in city centres during working hours.
How It Works
Enter a postcode
Any UK postcode to check mobile coverage for all four operators.
We check coverage data
Ofcom mobile coverage data for all four networks.
See your signal report
4G/5G availability, indoor/outdoor signal, and network comparison.
Frequently Asked Questions
Which mobile network has the best UK coverage?
As of 2026, EE has the widest 4G geographic coverage at approximately 91% of the UK landmass, followed by Three at 88%, Vodafone at 87%, and O2 at 86%. For 5G, EE also leads with coverage in over 500 towns and cities, though 5G is still primarily an urban technology. Coverage varies significantly by location, so checking your specific postcode is essential rather than relying on national averages.
Why is my mobile signal poor at home?
Several factors can weaken mobile signal indoors: distance from the nearest cell tower, the building materials of your home (thick stone walls, energy-efficient glazing, and metal-clad buildings all block signal), local terrain such as hills or valleys, nearby buildings creating signal shadows, and the number of users on the local cell tower. Interestingly, modern energy-efficient homes can have worse signal than older buildings due to foil-backed insulation and triple glazing blocking radio waves.
What is the difference between 4G and 5G?
4G typically delivers download speeds of 20-50 Mbps with latency of 30-50ms. 5G offers significantly faster speeds (100-300 Mbps typical, up to 1 Gbps in ideal conditions) and much lower latency (under 10ms). However, 5G coverage is limited primarily to urban areas, and higher-frequency 5G signals have shorter range and are more easily blocked by buildings. For most UK users in 2026, 4G remains the primary mobile connection.
What mobile signal data does PostcodeCheck show?
Our area reports include estimated mobile signal strength and coverage for all four major UK networks (EE, Three, Vodafone, and O2), including whether 4G and 5G are available at your postcode. We also show indoor and outdoor signal predictions. This data comes from Ofcom's mobile coverage data; if Ofcom's service is unavailable we show an estimate based on population density.
Can I improve mobile signal at home?
Yes. Options include: Wi-Fi calling (most modern phones and networks support this, routing calls over your broadband), femtocells or signal boosters (small devices from your network that create a mini cell tower using your broadband), positioning yourself near windows on the side of the house facing the nearest cell tower, and switching network if a competitor has better coverage at your address. Ofcom-approved signal boosters are now legal in the UK. If poor mobile signal is the main issue, a fast home broadband connection with Wi-Fi calling enabled is often the most cost-effective fix.
Does mobile signal affect house prices?
While the effect is smaller than factors like schools or crime, poor mobile coverage can deter buyers, particularly in rural areas where mobile is the primary or only connectivity option. With the growth of remote working, reliable mobile and broadband connectivity have become more important to buyers. Estate agents increasingly list connectivity information in property details.
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Free, instant mobile coverage data for any UK area from Ofcom and network operators.
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