Dean mobile coverage EE 47% indoors here, 91% across Portsmouth PO18 · Arun
Three has the best measured coverage in PO18: 99/100, 7 points ahead of EE on Ofcom's overall score, with O2 within 2 points.
PO18: Dean, Chichester, Lavant, Harting, Tangmere, Westbourne, Southbourne, Bosham (Arun, Chichester).
PO18 scores
Ofcom Mobile Coverage data (May 2025), measured across 47 addresses in 5 sampled postcodes: PO18 8AA, PO18 9AH, PO18 9AX, PO18 9BE, PO18 9BN. Methodology.
How PO18 compares
Against the Portsmouth average
- EE indoors: 47% here, 91% across Portsmouth (−44).
- Vodafone indoors: 72% here, 99% across Portsmouth (−27).
- O2 indoors: 81% here, 98% across Portsmouth (−17).
Weakest spot in Portsmouth: PO17 Wickham, where EE reaches 28% indoors.
Lowest indoor figure of the 19 Portsmouth districts sampled, for O2 and Vodafone.
Indoor signal around PO18
| District | km away | EE | O2 | Three | Vodafone |
|---|---|---|---|---|---|
| PO18 Dean (here) | – | 47% | 81% | 94% | 72% |
| PO19 Chichester, Lavant | 4 | 98% | 100% | 100% | 100% |
| PO10 Westbourne, Southbourne | 8 | 100% | 100% | 100% | 100% |
| PO20 Wittering, Pagham | 9 | 86% | 94% | 83% | 100% |
| PO9 Rowlands Castle, Stoughton | 12 | 100% | 100% | 100% | 100% |
| Portsmouth average | – | 91% | 98% | 98% | 99% |
Biggest difference nearby: EE indoors, 47% here and 98% in PO19 Chichester, 4 km away.
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iD Mobile runs on Three's network: £6 a month for 15GB (read 19 October 2026). A price, not a coverage ranking: Three leads this page on Ofcom's data alone.
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