Q1
Best network for CF12?
EE leads with 94/100 — driven by 88% 5G and 99% 4G in this densely populated urban part of Cardiff.
CF12 DISTRICT · CARDIFF
Best mobile network in CF12 Cardiff postcode district
Comparing EE, Vodafone, O2 and Three across 5G · 4G · 3G for the CF12 postcode district in Cardiff.
RESULT · CF12 · CARDIFF
Coverage for CF12 district
★ BEST OPERATOR
EE
94/100
EE delivers the strongest coverage for the CF12 district in Cardiff. Scored across 5G, 4G and 3G using the latest UK operator footprint data.
Full ranking — CF12
#1
EE
#2
Three
#3
O2
#4
Vodafone
Coverage analysis — CF12
Based on Ofcom Connected Nations 2024 data, EE is the clear winner in Cardiff. 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 99%. 5G and 4G scores are closely matched, reflecting a mature, stable network.
EE noticeably leads Three by 4 points overall. While Three reaches 80% on 5G and 100% on 4G in Cardiff, 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
Pairing great coverage with great value, here are the top EE contracts available now.
Explore the Cardiff area
View full coverage analysis for the Cardiff (CF) area, or enter any UK postcode in the scanner above for a personalised result.
Coverage FAQ — CF12
Q2
Is 5G available in CF12?
EE provides excellent 5G coverage at 88%. Three follows at 80%.
Q3
Which network has the best 4G?
EE leads 4G too at 99%. Reliable 4G is critical in densely populated urban areas.
Q4
Is O2 worth considering?
O2 scores 85/100 in CF12 (70% 5G, 100% 4G). It may suit certain tariff or price preferences despite trailing the top two.