SA POSTCODE AREA · 9 DISTRICTS SAMPLED
Swansea mobile coverage Vodafone strongest indoors, 95% vs Three 81% SA postcode area
No network wins Swansea on overall coverage: all four are within 2 points, but indoors Vodafone reaches 95% of sampled addresses and Three 81%.
Swansea as a whole
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O2
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Vodafone
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EE
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Three
Ofcom Mobile Coverage data (May 2025), measured across 1,063 addresses in 47 sampled postcodes, pooled from 9 districts. Methodology.
What differs inside Swansea
Where the networks split most
- SA4 Llannon, Llwchwr, Tircoed: indoors Vodafone 97%, EE 4%.
- SA5 Killay, Cockett, Landore: indoors EE and Vodafone 100%, Three 32%.
- SA6 Clydach, Landore, Morriston: indoors EE, Three and Vodafone 100%, O2 78%.
Each network's weakest and strongest district
| Network | Indoor |
|---|---|
| EE | 4% in SA4 Llannon; 100% in 7 districts |
| O2 | 65% in SA3 Sketty; 100% in 5 districts |
| Three | 18% in SA4 Llannon; 100% in 6 districts |
| Vodafone | 67% in SA3 Sketty; 100% in 6 districts |
Middle of the area against its edges
The 3 districts nearest the middle (SA5 Killay, SA6 Clydach, SA7 Clydach) against the 3 furthest out (SA3 Sketty, SA8 Clydach, SA9 Llywel):
- EE indoors: 100% in the middle, 89% at the edges.
- Vodafone indoors: 99% in the middle, 89% at the edges.
District by district
| District | Places | Indoor, low to high | Addresses |
|---|---|---|---|
| SA1 | Cockett, Landore, Uplands | 100% on all four | 62 |
| SA2 | Killay, Sketty, Cockett | 100% on all four | 81 |
| SA3 | Sketty, Mumbles, Pennard | Three 57%; Vodafone 67% | 129 |
| SA4 | Llannon, Llwchwr, Tircoed | EE 4%; Vodafone 97% | 94 |
| SA5 | Killay, Cockett, Landore | Three 32%; EE and Vodafone 100% | 105 |
| SA6 | Clydach, Landore, Morriston | O2 78%; the rest 100% | 170 |
| SA7 | Clydach, Llansamlet, Bonymaen | Vodafone 98%; the rest 100% | 167 |
| SA8 | Clydach, Pontardawe, Mawr | 100% on all four | 140 |
| SA9 | Llywel, Pontardawe, Ystalyfera | 100% on all four | 115 |
Guide: Best Mobile Network in Swansea (2026): UK Coverage Compared
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