Q1
Best network for CF18?
EE leads with 93/100 — driven by 87% 5G and 100% 4G in this densely populated urban part of Cardiff.
CF18 DISTRICT · CARDIFF
Best mobile network in CF18 Cardiff postcode district
Comparing EE, Vodafone, O2 and Three across 5G · 4G · 3G for the CF18 postcode district in Cardiff.
RESULT · CF18 · CARDIFF
Coverage for CF18 district
★ BEST OPERATOR
EE
93/100
EE delivers the strongest coverage for the CF18 district in Cardiff. Scored across 5G, 4G and 3G using the latest UK operator footprint data.
Full ranking — CF18
#1
EE
#2
Three
#3
O2
#4
Vodafone
Coverage analysis — CF18
Comparing Ofcom-verified operator coverage footprints, EE leads the field in Cardiff. In this densely populated urban area, EE achieves an overall coverage score of 93/100 — driven by excellent 5G coverage (87%) and rock-solid 4G at 100%. 5G and 4G scores are closely matched, reflecting a mature, stable network.
EE comfortably leads Three by 5 points overall. While Three reaches 78% 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 86 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 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 — CF18
Q2
Is 5G available in CF18?
EE provides excellent 5G coverage at 87%. Three follows at 78%.
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 86/100 in CF18 (73% 5G, 100% 4G). It may suit certain tariff or price preferences despite trailing the top two.