Llywel mobile coverage Three 100% indoors here, 81% across Swansea SA9 · Carmarthenshire
No network wins SA9 on overall coverage: all four score 100/100.
SA9: Llywel, Pontardawe, Ystalyfera, Cwmllynfell, Ystradgynlais, Tawe-Uchaf, Quarter Bach, Maescar (Carmarthenshire, Neath Port Talbot, Powys).
SA9 scores
Ofcom Mobile Coverage data (May 2025), measured across 115 addresses in 6 sampled postcodes: SA9 1BH, SA9 1DU, SA9 1EY, SA9 1HP, SA9 1JX, SA9 1LW. Methodology.
How SA9 compares
Against the Swansea average
- Three indoors: 100% here, 81% across Swansea (+19).
- EE indoors: 100% here, 87% across Swansea (+13).
- O2 indoors: 100% here, 91% across Swansea (+9).
Weakest spot in Swansea: SA4 Llannon, where EE reaches 4% indoors.
Indoor signal around SA9
| District | km away | EE | O2 | Three | Vodafone |
|---|---|---|---|---|---|
| SA9 Llywel (here) | – | 100% | 100% | 100% | 100% |
| SA8 Clydach, Pontardawe | 9 | 100% | 100% | 100% | 100% |
| SA7 Clydach, Llansamlet | 15 | 100% | 100% | 100% | 98% |
| SA6 Clydach, Landore | 16 | 100% | 78% | 100% | 100% |
| SA5 Killay, Cockett | 20 | 100% | 98% | 32% | 100% |
| Swansea average | – | 87% | 91% | 81% | 95% |
Biggest difference nearby: O2 indoors, 100% here and 78% in SA6 Clydach, 16 km away.
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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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