Best mobile network in SG4 Stevenage postcode district

Cross-referencing EE, Vodafone, O2 and Three using Ofcom 2024 data, EE delivers the strongest signal in Stevenage. In this suburban area, EE achieves an overall coverage score of 89/100 — driven by strong 5G coverage (79%) and rock-solid 4G at 98%. 5G and 4G scores are closely matched, reflecting a mature, stable network.

EE comfortably leads Three by 9 points overall. While Three reaches 60% on 5G and 99% on 4G in Stevenage, it falls short of EE's combined performance across all bands. O2 and Vodafone round out the field at 78 and 76 respectively.

EE has made solid 5G inroads across Stevenage, reaching 79% of premises in SG4. While not blanket coverage, most streets and town centres are covered — and 4G fallback at 98% keeps reliability high throughout.

The runner-up in SG4 is Three at 80/100 (60% 5G / 99% 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.