Which mobile network is best for the SO3 postcode district?

EE is the best mobile network for the SO3 district in Southampton, scoring 94/100 overall with 88% 5G and 100% 4G coverage.

Is there 5G coverage at SO3?

EE provides excellent 5G coverage in the SO3 area at 88%. This is a densely populated urban area, which benefits from high operator investment in 5G infrastructure.

What are the best phone deals near SO3?

Based on coverage for SO3, EE offers the best value combination of signal and deals. Current deals start from £35.00/month. Enter your full postcode on NetScan UK to see personalised results.

How does Three compare to EE in Southampton?

Three scores 89/100 in SO3, behind EE's 94/100. Three achieves 78% 5G versus EE's 88%.

SO3 DISTRICT · SOUTHAMPTON

Best mobile network in SO3 Southampton postcode district

Comparing EE, Vodafone, O2 and Three across 5G · 4G · 3G for the SO3 postcode district in Southampton.

RESULT · SO3 · SOUTHAMPTON

Coverage for SO3 district

Southampton · Densely populated urban density area · SO postcode area

★ BEST OPERATOR

94/100

EE delivers the strongest coverage for the SO3 district in Southampton. Scored across 5G, 4G and 3G using the latest UK operator footprint data.

88%

100%

99%

Full ranking — SO3

Overall: 94/100

88%

100%

99%

Three

Overall: 89/100

78%

99%

98%

Overall: 87/100

74%

100%

99%

Vodafone

Overall: 85/100

71%

100%

98%

Coverage analysis — SO3

Drawing on Ofcom Connected Nations 2024 premises coverage statistics, EE delivers the strongest signal in Southampton. In this densely populated urban area, EE achieves an overall coverage score of 94/100 — driven by excellent 5G coverage (88%) and rock-solid 4G at 100%. 5G and 4G scores are closely matched, reflecting a mature, stable network.

EE consistently leads Three by 5 points overall. While Three reaches 78% on 5G and 99% on 4G in Southampton, it falls short of EE's combined performance across all bands. O2 and Vodafone round out the field at 87 and 85 respectively.

Best phone deals from EE

To make the most of your winning network, here are the top EE contracts available now.

Apple Smart Benefits

iPhone 16 128GB

£35.00/mo + £30 upfront

100GB data 24-month contract

View on EE →

Apple Apple TV+

iPhone 16 Pro 256GB

£52.00/mo + £30 upfront

Unlimited data 24-month contract

View on EE →

Apple 5G Stay Fast

iPhone 16 Plus 128GB

£40.00/mo + £30 upfront

250GB data 24-month contract

View on EE →

Apple Best for budget

iPhone 16e 128GB

£25.21/mo + £30 upfront

50GB data 24-month contract

View on EE →

Samsung Free upgrade @18mo

Galaxy S25 256GB

£42.00/mo + £30 upfront

Unlimited data 24-month contract

View on EE →

Samsung Galaxy AI

Galaxy S25 Ultra 256GB

£58.00/mo + £30 upfront

Unlimited data 24-month contract

View on EE →

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 — SO3

Best network for SO3?

EE leads with 94/100 — driven by 88% 5G and 100% 4G in this densely populated urban part of Southampton.

Is 5G available in SO3?

EE provides excellent 5G coverage at 88%. Three follows at 78%.

Which network has the best 4G?

EE leads 4G too at 100%. Reliable 4G is critical in densely populated urban areas.

Is O2 worth considering?

O2 scores 87/100 in SO3 (74% 5G, 100% 4G). It may suit certain tariff or price preferences despite trailing the top two.