Q1
Best network for PO20?
Vodafone leads with 100/100 — driven by 100% 5G and 100% 4G in this densely populated urban part of Portsmouth.
PO20 DISTRICT · ARUN
Best mobile network in Wittering PO20 · Arun
EE, O2, Three and Vodafone score between 97 and 100 out of 100 in PO20 — no network wins here on coverage. 100% 5G-grade · 100% 4G. Ofcom Mobile Coverage data (May 2025), measured across 84 addresses in 6 sampled postcodes.
The PO20 district covers Wittering, Pagham, Barnham and Tangmere, in Arun. Signal varies street by street — scan your exact postcode below.
RESULT · PO20 · PORTSMOUTH
Coverage for PO20 district
✓ ALL FOUR MEASURE THE SAME
All four networks
100/100
Ofcom measures all four networks within 3 points in the PO20 district, so coverage is not the thing to choose on here. Compare price and contract length instead.
Full ranking — PO20
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Vodafone
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O2
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EE
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Three
Coverage analysis — PO20
No network wins Portsmouth on coverage. All four are within 3 points of each other in Ofcom's measurements, across 84 addresses sampled in 6 postcodes. On a difference that small, EE, O2, Three and Vodafone will all work here — so choose on price, contract length and roaming, not on a coverage map. Coverage only becomes the deciding factor once you leave built-up areas, and it still varies street by street indoors: check your own postcode below to see the measurement for your address rather than for Portsmouth as a whole.
Ranked by Ofcom's overall score: Vodafone 100, O2 99, EE 98, Three 97. The spread between best and worst is 3 points, which is inside the margin where a coverage figure stops being a useful tiebreak. Ofcom's data describes outdoor signal across sampled addresses; it cannot tell you how any of them behave inside your own building.
Why Vodafone for PO20?
Vodafone's 5G rollout in Portsmouth is among the strongest nationally, covering 100% of premises in the PO20 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 PO20 is O2 at 99/100 (100% 5G / 100% 4G). It is a close contest — both operators deliver strong coverage in PO20, and your choice may come down to tariff, handset preference, or existing contract.
Choosing a network in Wittering
Every network reaches Wittering, Pagham, Barnham and Tangmere to the same standard in Ofcom's data (within 3 points), so coverage cannot pick one for you here — price and contract length can. Compare what each is charging, then check the exact street you live on before you commit, because indoor signal still varies where the area figures match.
Some links on this page are affiliate links. If you switch through one we may be paid a commission. It never changes which network we rank first - that comes from Ofcom coverage data alone.
Explore the Portsmouth area
View full coverage analysis for the Portsmouth (PO) area, or enter any UK postcode in the scanner above for a personalised result.
Coverage FAQ — PO20
Q2
Is 5G available in PO20?
Vodafone provides excellent 5G coverage at 100%. O2 follows at 100%.
Q3
Which network has the best 4G?
Vodafone leads 4G too at 100%. Reliable 4G is critical in densely populated urban areas.
Q4
Is EE worth considering?
EE scores 98/100 in PO20 (100% 5G, 100% 4G). It may suit certain tariff or price preferences despite trailing the top two.