This guide answers one question for Newcastle: which mobile network gives the best signal, and where the answer changes. Every figure in it is Ofcom's own measurement: the Ofcom Mobile Coverage data (May 2025) behind NetScan's Newcastle coverage checker, covering 2,218 addresses in 105 sampled postcodes across 19 postcode districts (NE1 to NE20). Nothing here is estimated, and no network is called best where the data does not say so.
Across Newcastle as a whole, Ofcom's data does not separate the four networks at all: EE, O2, Three and Vodafone each score 99/100 overall. Outdoors they are level: across the four, good outdoor 4G reaches 100% of sampled addresses and Ofcom's top 'enhanced' outdoor grade 99-100%. Indoors they are level city-wide too: each reaches good indoor signal at 95% of addresses.
The real differences are local. In 6 of the 19 districts, at least one network's indoor figure sits 5 or more points behind the others, and the gap can be large: in NE18, Ofcom finds good indoor Vodafone signal at 3% of the 59 addresses it sampled. This guide maps those districts, so you can see whether yours is one of them before you pick a network.
Newcastle at a glance: the four networks on Ofcom's figures
These are the Newcastle-wide figures, pooled across all 19 districts and weighted by the number of addresses sampled in each. They are the same numbers the Newcastle coverage checker shows. The order is the checker's (overall score, ties broken alphabetically); it is not a recommendation.
What the columns mean: Ofcom grades the predicted signal at each address. '5G-grade outdoor' is the share of addresses at Ofcom's top 'enhanced' outdoor data grade, a signal-strength grade rather than a promise of 5G service on your plan. 'Good outdoor 4G' is the share with good or better outdoor data signal, and 'Good indoor' the share with good or better indoor data signal. 'Overall' blends the three (35%, 50% and 15%).
| Network | Overall | 5G-grade outdoor | Good outdoor 4G | Good indoor |
|---|---|---|---|---|
| EE | 99/100 | 99% | 100% | 95% |
| O2 | 99/100 | 100% | 100% | 95% |
| Three | 99/100 | 100% | 100% | 95% |
| Vodafone | 99/100 | 100% | 100% | 95% |
Source: Ofcom Mobile Coverage data (May 2025), 2,218 addresses in 105 postcodes, NE1 to NE20.
Where the networks differ in Newcastle: district by district
The Newcastle-wide averages hide the districts where one network falls behind indoors. The table lists every district where the four networks' good-indoor figures are 5 or more points apart. Among districts where Ofcom sampled at least 30 addresses, the lowest readings are Vodafone in NE18 (3% of 59 addresses), EE in NE18 (8% of 59 addresses), Three in NE20 (27% of 96 addresses) and O2 in NE20 (35% of 96 addresses).
It is not the same network everywhere. Trailing by 5 or more points indoors: EE in NE8, NE11, NE18 and NE19; O2 in NE10, NE19 and NE20; Vodafone in NE18 and NE20; Three in NE20. That is why a single 'best network in Newcastle' answer does not hold up, and why the district you live or work in matters more than the city.
Outdoor signal differs in fewer places: in NE18, EE reaches the 5G-grade level at 81% and Vodafone reaches the 5G-grade level at 83%. Everywhere else in the table the four are level outdoors and differ only indoors.
| District | Addresses | EE | O2 | Three | Vodafone |
|---|---|---|---|---|---|
| NE8 | 104 | 85% | 100% | 100% | 100% |
| NE10 | 162 | 100% | 92% | 100% | 99% |
| NE11 | 149 | 92% | 100% | 100% | 100% |
| NE18 | 59 | 8% | 49% | 49% | 3% |
| NE19 | 2 | 0% | 0% | 100% | 100% |
| NE20 | 96 | 83% | 35% | 27% | 51% |
Good indoor data signal, share of sampled addresses. Ofcom Mobile Coverage data (May 2025).
The Newcastle districts where all four measure the same
In 11 of the 19 districts (NE1, NE2, NE3, NE4, NE5, NE7, NE9, NE12, NE15, NE16 and NE17) Ofcom's figures are identical for EE, O2, Three and Vodafone on all three measures: 5G-grade outdoor, good outdoor 4G and good indoor. If your address is in one of these, the coverage data gives you no reason to prefer one network, so the useful comparison is plan price, contract length and roaming, including the cheaper SIM brands that share each network's masts.
Choosing a network in Newcastle with this data
Start with your district rather than the city. If it is in the table above, look at which network trails there and treat that as the one to check hardest, especially if you use your phone mostly indoors. A figure like 3% means most sampled addresses in NE18 are not predicted good indoor Vodafone signal; it does not mean yours is one of them, so check your own postcode.
If your district is not in the table, the four networks measure within 5 points of each other indoors there and are level outdoors, so the decision moves to price and terms. Either way, the network you choose also decides which SIM brands you can use on it: giffgaff and Tesco Mobile run on O2's masts; SMARTY and iD Mobile on Three's; VOXI, Talkmobile and Lebara on Vodafone's; and 1pMobile on EE's. A SIM brand gets its host network's coverage, so the district figures above apply to it as well. Plan prices change often, so check the provider's own site for today's price.
What Ofcom's figures can and can't tell you
Ofcom's data is a prediction of signal at each sampled address, not a speed test, and the sample per district ranges from 2 to 198 addresses in Newcastle. Indoor signal in particular depends on the building: thick walls, basements and foil-backed insulation all cut it. The figures cover the 19 districts from NE1 to NE20 that NetScan holds Ofcom measurements for.
Two practical checks close the gap. Run your full postcode through NetScan's scanner to see the four networks for your own district, then confirm on the operator's own coverage checker. If indoor signal is the problem at home, Wi-Fi calling on a compatible phone and plan routes calls over your broadband instead.