Every network's advert says it covers around 99 percent of the UK. Every advert is measuring people, not places. On Ofcom's independent numbers the four networks really are close outdoors, and they pull far apart in the three places it actually hurts: indoors, in rural areas and on 5G. This guide shows where each network genuinely stands, using the regulator's own measurements rather than anyone's marketing, and then shows you how to answer the only question that matters: what is coverage like at your address?
Which network has the best coverage?
Nationally, it is closer than the arguing suggests. Vodafone edges indoor 4G, reaching 97.4 percent of UK premises, with EE, Three and O2 all within two points of it. Outdoors, every network passes 99 percent. If you live and work in a town, any of the four will almost certainly serve you well.
The gaps open elsewhere. EE leads 5G by a distance, rural coverage varies sharply by network, and the figure that matters for your kitchen is the indoor one, not the headline. The table below is Ofcom's data, network by network.
| Network | 4G indoors | 4G indoors, rural | 4G outdoors | 5G outdoors | 5G outdoors, rural |
|---|---|---|---|---|---|
| EE | 96.8% | 85.2% | 99.7% | 94.3% | 76.9% |
| O2 | 95.5% | 82% | 99.6% | 86.2% | 67.9% |
| Three | 96.6% | 85% | 99.8% | 75.9% | 35.9% |
| Vodafone | 97.4% | 86.7% | 99.8% | 77.3% | 37.2% |
| All four networks | 90.7% | 63.7% | 99.2% | 63.9% | 19.6% |
Figures are the share of UK premises predicted to have good coverage. “All four networks” is the share covered by every operator at once, which is why it sits below each individual network.
One honest caveat before the detail. A national winner is no use to you if it happens to be the one network with a weak spot over your street. Treat this table as the form guide, then check your own address before you commit; the checker section below takes two minutes.
A word on where these numbers come from, because it matters. They are Ofcom's measurements, published in Connected Nations, and we show them unedited. No network pays to look better in this table, and none can. The same cannot be said of every coverage claim you will read this week.
"99 percent coverage" is measuring people, not places
Networks quote population coverage because most people live close together, which makes the number flattering. Measure the land instead and the picture changes. Good 4G from all four networks covers 84 percent of the UK landmass, and at least one network reaches 96 percent, according to Ofcom's Spring 2026 Connected Nations update.
That missing chunk of the map is not where people live, mostly. It is where people walk, drive, camp and break down. If your life includes the hillier parts of the country, the geographic number is the one to care about. It explains why the same phone that streams video at home can struggle to send a text on holiday.
Indoors is the real test
Walls eat signal. Thick stone does it the old-fashioned way and modern insulated glazing does it surprisingly well too. So while outdoor 4G from every network covers 99.2 percent of premises, get all four networks indoors and the figure is 90.7 percent.
Now go rural. Indoor 4G from all four networks covers just 63.7 percent of rural premises; the individual networks manage between 82 and 87 percent. In other words, more than one rural home in ten is invisible to at least one network the moment the front door shuts. If the map says your chosen network is marginal outdoors at your address, assume it will be worse in the living room.
5G: big numbers, wide ranges
5G is where the networks separate. Ofcom's latest figures put individual networks between 76 and 94 percent of premises for outdoor 5G, and our table above shows who sits where: EE at the top on 94.3 percent, Three and Vodafone in the seventies. Coverage from all four networks at once is 63.9 percent, up from 47 a year earlier, so the gap is closing but real.
Rural 5G is still a postcode lottery. All four networks together reach under 20 percent of rural premises outdoors, and the spread between networks is enormous: EE covers 76.9 percent of rural premises, Three 35.9. There is also a newer flavour called 5G standalone, which runs 5G end to end rather than leaning on the 4G core underneath; the three networks running it cover between 49 and 85 percent of premises outdoors. For most people it is not yet a reason to pick a network.
Rural coverage is improving, slowly
The Shared Rural Network, a joint programme between the four operators and government, is why the all-network landmass figure climbed from 66 percent to 84. By the end of April 2026, 129 government-funded mast upgrades were live: 53 in Wales, 44 in Scotland and 32 in England. More are coming, so a rural area that failed the coverage check two years ago is worth checking again.
The practical takeaway for rural buyers: do not assume the network that failed you in 2023 still fails you now, and do not assume the one that worked still wins. Masts have moved. Run the address check fresh each time your contract comes up.
How do you check coverage where you live?
Two tools, two different jobs.
For your exact address, use Ofcom's Map Your Mobile checker. It shows all four networks side by side, indoors and outdoors, which no network's own map will do. Be honest with yourself about what it is: a prediction from operator models, not a measurement at your window. Ofcom defines "good" 4G coverage as a 98 percent chance of completing a 90-second call, with at least a 95 percent chance of 2Mbps. So check every place you actually spend time, home, work and the commute between them, and treat "variable" as a warning rather than a maybe.
For the wider picture, our UK mobile coverage map ranks every local authority and constituency on the same Ofcom dataset as the table above. It shows the best and worst areas for 4G and 5G, the places served by a single network, and the notspots where nobody reaches. That is the context the address checker cannot give you.
Same masts, smaller bill
Here is the quiet good news: you do not have to pay a big network's price to get a big network's coverage. Smaller networks rent the same masts. iD Mobile and Smarty run on Three, giffgaff runs on O2, Voxi, Talkmobile, Lebara and Asda Mobile run on Vodafone, and Lycamobile and spusu run on EE. Coverage at your address is identical to the host network; the bill usually is not.
So the smart order is: find the network whose signal wins at your address, then shop across everyone who uses its masts. Our SIM only comparison shows the host network on every deal.
Stuck with bad signal?
If you are mid-contract in a weak spot, three things help. First, turn on Wi-Fi calling; every major network supports it, and it routes calls and texts over your broadband so indoor notspots stop mattering. Second, when the contract allows, switch to a network on different masts, and take your number with you using the free text process in our guide to switching and keeping your number.
Third, know where you stand on leaving early. The honest answer is that poor coverage by itself is rarely a penalty-free exit, because predicted coverage is not a contractual promise. That is exactly why the two-minute address check before signing matters more than any argument after. Ofcom's guide to improving mobile reception covers the other practical fixes, from femtocells to signal-friendly router placement.