Best mobile network in SO4 Southampton postcode district

Drawing on Ofcom Connected Nations 2024 premises coverage statistics, EE leads the field in Southampton. In this densely populated urban area, EE achieves an overall coverage score of 92/100 — driven by strong 5G coverage (83%) and rock-solid 4G at 100%. 5G and 4G scores are closely matched, reflecting a mature, stable network.

EE comfortably leads Three by 5 points overall. While Three reaches 76% on 5G and 99% on 4G in Southampton, it falls short of EE's combined performance across all bands. Vodafone and O2 round out the field at 86 and 84 respectively.

EE's 5G rollout in Southampton is among the strongest nationally, covering 83% of premises in the SO4 district. For anyone streaming video, gaming on mobile, or relying on a mobile hotspot at home, this level of 5G penetration makes a real difference to day-to-day speed.

The runner-up in SO4 is Three at 87/100 (76% 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.