Q1
Best network for SO20?
EE leads with 91/100 — driven by 82% 5G and 100% 4G in this densely populated urban part of Southampton.
SO20 DISTRICT · SOUTHAMPTON
Best mobile network in SO20 Southampton postcode district
Comparing EE, Vodafone, O2 and Three across 5G · 4G · 3G for the SO20 postcode district in Southampton.
RESULT · SO20 · SOUTHAMPTON
Coverage for SO20 district
★ BEST OPERATOR
EE
91/100
EE delivers the strongest coverage for the SO20 district in Southampton. Scored across 5G, 4G and 3G using the latest UK operator footprint data.
Full ranking — SO20
#1
EE
#2
Three
#3
O2
#4
Vodafone
Coverage analysis — SO20
According to Ofcom's December 2024 Connected Nations report, EE outperforms rivals in Southampton. In this densely populated urban area, EE achieves an overall coverage score of 91/100 — driven by strong 5G coverage (82%) and rock-solid 4G at 100%. 5G and 4G scores are closely matched, reflecting a mature, stable network.
EE comfortably leads Three by 1 points overall. While Three reaches 80% on 5G and 100% on 4G in Southampton, it falls short of EE's combined performance across all bands. O2 and Vodafone round out the field at 85 and 85 respectively.
Best phone deals from EE
Because signal quality matters most when choosing a phone contract, here are the top EE contracts available now.
Explore the Southampton area
View full coverage analysis for the Southampton (SO) area, or enter any UK postcode in the scanner above for a personalised result.
Coverage FAQ — SO20
Q2
Is 5G available in SO20?
EE provides strong 5G coverage at 82%. Three follows at 80%.
Q3
Which network has the best 4G?
EE leads 4G too at 100%. Reliable 4G is critical in densely populated urban areas.
Q4
Is O2 worth considering?
O2 scores 85/100 in SO20 (70% 5G, 99% 4G). It may suit certain tariff or price preferences despite trailing the top two.