Epsom mobile coverage Within 8 points of the Sutton average SM3 · Epsom and Ewell
No network wins SM3 on overall coverage: all four score 100/100.
SM3: Epsom, Ewell, Cheam, Nonsuch, Stonecot, North Cheam, Lower Morden, Sutton Central (Epsom and Ewell, Merton, Sutton).
SM3 scores
Ofcom Mobile Coverage data (May 2025), measured across 139 addresses in 6 sampled postcodes: SM3 8LA, SM3 8PL, SM3 9QE, SM3 9SF, SM3 9TB, SM3 9TZ. Methodology.
How SM3 compares
Every network here is within 8 points of the Sutton average and of SM1 Sutton, SM2 Sutton, SM4 St Helier and SM5 St Helier, indoors and outdoors.
Weakest spot in Sutton: SM7 Reigate, where Three reaches 63% indoors.
Indoor signal around SM3
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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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