Comparing EE, Vodafone, O2 and Three across 5G · 4G · 3G for the South West London (SW) postcode area. Use the scanner below to check your exact postcode.
Ofcom measures EE, O2, Three and Vodafone identically in South West London (SW), so no network wins here on coverage. Pick on price — then check your own postcode, because indoor signal still varies street by street.
No network wins South West London on coverage. All four score identically in Ofcom's measurements, across 3,148 addresses sampled in 125 postcodes. On a difference that small, EE, O2, Three and Vodafone will all work here — so choose on price, contract length and roaming, not on a coverage map. Coverage only becomes the deciding factor once you leave built-up areas, and it still varies street by street indoors: check your own postcode below to see the measurement for your address rather than for South West London as a whole.
Ranked by Ofcom's overall score: EE 100, O2 100, Three 100, Vodafone 100. The spread between best and worst is 0 points, which is inside the margin where a coverage figure stops being a useful tiebreak. Ofcom's data describes outdoor signal across sampled addresses; it cannot tell you how any of them behave inside your own building.
These scores for South West London are Ofcom's own measurements, taken from the Ofcom Mobile Coverage API (May 2025 data) across 3,148 addresses in 125 postcodes. They describe outdoor signal at sampled addresses across the whole of South West London; signal inside a specific building, and on a specific street, can differ from the area figure.
Every network clears the bar in the SW postcode area, so the honest advice is to stop comparing coverage maps and start comparing prices — the difference between the cheapest and dearest plan will dwarf a 0-point coverage gap. Check your own postcode above first: indoor signal varies street by street even where the area figures match.
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No network wins South West London on coverage. Ofcom's measurements rate EE, O2, Three and Vodafone identically here (EE 100, O2 100, Three 100, Vodafone 100 out of 100), which is too close to call a winner. All four will work in South West London, so choose on price, contract length and roaming instead.
EE reaches enhanced (5G-grade) outdoor signal at 100% of the addresses Ofcom sampled in South West London, and the other three are within 0 points of it.
O2 is the second-best operator in South West London with 100/100 overall (100% 5G, 100% 4G).
South West London is classified as a densely populated urban area with a population density score of 98%. Urban areas benefit from high tower density across all bands.
Check mobile coverage for specific postcode districts in South West London:
Compare mobile coverage in nearby London areas:
