Best mobile network in SG9 Stevenage postcode district

Cross-referencing EE, Vodafone, O2 and Three using Ofcom 2024 data, EE leads the field in Stevenage. In this suburban area, EE achieves an overall coverage score of 89/100 — driven by strong 5G coverage (78%) and rock-solid 4G at 100%. 5G and 4G scores are closely matched, reflecting a mature, stable network.

EE clearly leads O2 by 9 points overall. While O2 reaches 62% on 5G and 98% on 4G in Stevenage, it falls short of EE's combined performance across all bands. Three and Vodafone round out the field at 79 and 77 respectively.

EE has made solid 5G inroads across Stevenage, reaching 78% of premises in SG9. While not blanket coverage, most streets and town centres are covered — and 4G fallback at 100% keeps reliability high throughout.

The runner-up in SG9 is O2 at 80/100 (62% 5G / 98% 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.