Chelsea mobile coverage Within 8 points of the South West London average SW3 · Kensington and Chelsea
No network wins SW3 on overall coverage: all four score 100/100.
SW3: Chelsea, Kensington, Stanley, Brompton, Hans Town, Belgravia, Courtfield, Clapham Town (Kensington and Chelsea, Lambeth, Westminster).
SW3 scores
Ofcom Mobile Coverage data (May 2025), measured across 107 addresses in 6 sampled postcodes: SW3 3HB, SW3 3NR, SW3 3RU, SW3 3TQ, SW3 4EH, SW3 4UZ. Methodology.
How SW3 compares
Every network here is within 8 points of the South West London average and of SW7 Chelsea, SW1W Chelsea, SW10 Fulham and SW1V Pimlico, indoors and outdoors.
Weakest spot in South West London: SW15 Putney, where O2 reaches 41% indoors.
Indoor signal around SW3
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1pMobile runs on EE's network: £5 a month for 5GB (read 19 October 2026). A price, not a coverage ranking: Ofcom separates no network here.
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