Q1
Best network for CM1?
EE leads with 84/100 — driven by 70% 5G and 98% 4G in this mixed urban-rural part of Chelmsford.
CM1 DISTRICT · CHELMSFORD
Best mobile network in CM1 Chelmsford postcode district
Comparing EE, Vodafone, O2 and Three across 5G · 4G · 3G for the CM1 postcode district in Chelmsford.
RESULT · CM1 · CHELMSFORD
Coverage for CM1 district
★ BEST OPERATOR
EE
84/100
EE delivers the strongest coverage for the CM1 district in Chelmsford. Scored across 5G, 4G and 3G using the latest UK operator footprint data.
Full ranking — CM1
#1
EE
#2
Three
#3
O2
#4
Vodafone
Coverage analysis — CM1
According to Ofcom's December 2024 Connected Nations report, EE comes out on top for Chelmsford. In this mixed urban-rural area, EE achieves an overall coverage score of 84/100 — driven by strong 5G coverage (70%) and rock-solid 4G at 98%. 5G and 4G scores are closely matched, reflecting a mature, stable network.
EE consistently leads Three by 7 points overall. While Three reaches 56% on 5G and 98% on 4G in Chelmsford, it falls short of EE's combined performance across all bands. O2 and Vodafone round out the field at 75 and 72 respectively.
Best phone deals from EE
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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 — CM1
Q2
Is 5G available in CM1?
EE provides strong 5G coverage at 70%. Three follows at 56%.
Q3
Which network has the best 4G?
EE leads 4G too at 98%. Reliable 4G is critical in mixed urban-rural areas.
Q4
Is O2 worth considering?
O2 scores 75/100 in CM1 (52% 5G, 99% 4G). It may suit certain tariff or price preferences despite trailing the top two.