Q1
Best network for CM4?
EE leads with 82/100 — driven by 66% 5G and 99% 4G in this mixed urban-rural part of Chelmsford.
CM4 DISTRICT · CHELMSFORD
Best mobile network in CM4 Chelmsford postcode district
Comparing EE, Vodafone, O2 and Three across 5G · 4G · 3G for the CM4 postcode district in Chelmsford.
RESULT · CM4 · CHELMSFORD
Coverage for CM4 district
★ BEST OPERATOR
EE
82/100
EE delivers the strongest coverage for the CM4 district in Chelmsford. Scored across 5G, 4G and 3G using the latest UK operator footprint data.
Full ranking — CM4
#1
EE
#2
Three
#3
O2
#4
Vodafone
Coverage analysis — CM4
Cross-referencing EE, Vodafone, O2 and Three using Ofcom 2024 data, EE comes out on top for Chelmsford. In this mixed urban-rural area, EE achieves an overall coverage score of 82/100 — driven by good 5G coverage (66%) and rock-solid 4G at 99%. 5G and 4G scores are closely matched, reflecting a mature, stable network.
EE noticeably leads Three by 5 points overall. While Three reaches 55% on 5G and 99% on 4G in Chelmsford, it falls short of EE's combined performance across all bands. O2 and Vodafone round out the field at 73 and 70 respectively.
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Explore the Chelmsford area
View full coverage analysis for the Chelmsford (CM) area, or enter any UK postcode in the scanner above for a personalised result.
Coverage FAQ — CM4
Q2
Is 5G available in CM4?
EE provides good 5G coverage at 66%. Three follows at 55%.
Q3
Which network has the best 4G?
EE leads 4G too at 99%. Reliable 4G is critical in mixed urban-rural areas.
Q4
Is O2 worth considering?
O2 scores 73/100 in CM4 (48% 5G, 98% 4G). It may suit certain tariff or price preferences despite trailing the top two.