Q1
Best network for SA3?
EE leads with 95/100 — driven by 100% 5G and 100% 4G in this mixed urban-rural part of Swansea.
SA3 DISTRICT · SWANSEA
Best mobile network in Sketty SA3 · Swansea
EE, O2, Three and Vodafone score between 94 and 95 out of 100 in SA3 — no network wins here on coverage. 100% 5G-grade · 100% 4G. Ofcom Mobile Coverage data (May 2025), measured across 129 addresses in 5 sampled postcodes.
The SA3 district covers Sketty, Mumbles, Pennard and Bishopston. Signal varies street by street — scan your exact postcode below.
RESULT · SA3 · SWANSEA
Coverage for SA3 district
✓ ALL FOUR MEASURE THE SAME
All four networks
95/100
Ofcom measures all four networks within 1 point in the SA3 district, so coverage is not the thing to choose on here. Compare price and contract length instead.
Full ranking — SA3
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EE
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Vodafone
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O2
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Three
Coverage analysis — SA3
No network wins Swansea on coverage. All four are within 1 point of each other in Ofcom's measurements, across 129 addresses sampled in 5 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 Swansea as a whole.
Ranked by Ofcom's overall score: EE 95, Vodafone 95, O2 94, Three 94. The spread between best and worst is 1 point, 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 EE for SA3?
EE's 5G rollout in Swansea is among the strongest nationally, covering 100% of premises in the SA3 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 SA3 is Vodafone at 95/100 (100% 5G / 100% 4G). It is a close contest — both operators deliver strong coverage in SA3, and your choice may come down to tariff, handset preference, or existing contract.
Choosing a network in Sketty
Every network reaches Sketty, Mumbles, Pennard and Bishopston to the same standard in Ofcom's data (within 1 point), 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 Swansea area
View full coverage analysis for the Swansea (SA) area, or enter any UK postcode in the scanner above for a personalised result.
Coverage FAQ — SA3
Q2
Is 5G available in SA3?
EE provides excellent 5G coverage at 100%. Vodafone follows at 100%.
Q3
Which network has the best 4G?
EE leads 4G too at 100%. Reliable 4G is critical in mixed urban-rural areas.
Q4
Is O2 worth considering?
O2 scores 94/100 in SA3 (98% 5G, 100% 4G). It may suit certain tariff or price preferences despite trailing the top two.