Best mobile network in AL20 St Albans postcode district

According to Ofcom's December 2024 Connected Nations report, EE comes out on top for St Albans. In this suburban area, EE achieves an overall coverage score of 87/100 — driven by strong 5G coverage (75%) and rock-solid 4G at 99%. 5G and 4G scores are closely matched, reflecting a mature, stable network.

EE clearly leads Three by 6 points overall. While Three reaches 63% on 5G and 100% on 4G in St Albans, it falls short of EE's combined performance across all bands. Vodafone and O2 round out the field at 78 and 77 respectively.

EE has made solid 5G inroads across St Albans, reaching 75% of premises in AL20. While not blanket coverage, most streets and town centres are covered — and 4G fallback at 99% keeps reliability high throughout.

The runner-up in AL20 is Three at 81/100 (63% 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.