Best mobile network in SN3 Swindon postcode district

According to Ofcom's December 2024 Connected Nations report, EE scores highest across Swindon. In this mixed urban-rural area, EE achieves an overall coverage score of 84/100 — driven by good 5G coverage (68%) and rock-solid 4G at 100%. 5G and 4G scores are closely matched, reflecting a mature, stable network.

EE comfortably leads O2 by 8 points overall. While O2 reaches 55% on 5G and 97% on 4G in Swindon, it falls short of EE's combined performance across all bands. Three and Vodafone round out the field at 75 and 71 respectively.

EE has made solid 5G inroads across Swindon, reaching 68% of premises in SN3. While not blanket coverage, most streets and town centres are covered — and 4G fallback at 100% keeps reliability high throughout.

The runner-up in SN3 is O2 at 76/100 (55% 5G / 97% 4G). The margin is noticeable but not enormous. EE edges ahead on 5G depth; if your plan is with O2, 4G performance should still be solid.