Best mobile network in SA1 Swansea postcode district

Comparing Ofcom-verified operator coverage footprints, EE scores highest across Swansea. In this mixed urban-rural area, EE achieves an overall coverage score of 84/100 — driven by strong 5G coverage (70%) and rock-solid 4G at 99%. 5G and 4G scores are closely matched, reflecting a mature, stable network.

EE consistently leads Three by 6 points overall. While Three reaches 56% on 5G and 100% on 4G in Swansea, it falls short of EE's combined performance across all bands. O2 and Vodafone round out the field at 73 and 72 respectively.

EE has made solid 5G inroads across Swansea, reaching 70% of premises in SA1. While not blanket coverage, most streets and town centres are covered — and 4G fallback at 99% keeps reliability high throughout.

The runner-up in SA1 is Three at 78/100 (56% 5G / 100% 4G). The margin is noticeable but not enormous. EE edges ahead on 5G depth; if your plan is with Three, 4G performance should still be solid.