Q1
Best network for CO5?
EE leads with 91/100 — driven by 100% 5G and 100% 4G in this mixed urban-rural part of Colchester.
CO5 DISTRICT · BRAINTREE
Best mobile network in Mersea CO5 · Braintree
EE scores 91/100 — the best measured network for CO5 in Colchester, 13 points clear of the weakest. 100% 5G-grade · 100% 4G. Ofcom Mobile Coverage data (May 2025), measured across 19 addresses in 5 sampled postcodes.
The CO5 district covers Mersea, Feering, Tiptree and Kelvedon, in Braintree. Signal varies street by street — scan your exact postcode below.
RESULT · CO5 · COLCHESTER
Coverage for CO5 district
★ BEST MEASURED
EE
91/100
EE has the strongest measured coverage for the CO5 district in Colchester, 13 points clear of the weakest network in Ofcom's data.
Full ranking — CO5
#1
EE
#2
O2
#3
Vodafone
#4
Three
Coverage analysis — CO5
Drawing on Ofcom's sampled address-level coverage, EE scores highest across Colchester. In this mixed urban-rural area, EE achieves an overall coverage score of 91/100 — driven by excellent 5G coverage (100%) and rock-solid 4G at 100%. 5G and 4G scores are closely matched, reflecting a mature, stable network.
EE clearly leads O2 by 2 points overall. While O2 reaches 100% on 5G and 100% on 4G in Colchester, it falls short of EE's combined performance across all bands. Vodafone and Three round out the field at 79 and 78 respectively.
Why EE for CO5?
EE's 5G rollout in Colchester is among the strongest nationally, covering 100% of premises in the CO5 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 CO5 is O2 at 89/100 (100% 5G / 100% 4G). It is a close contest — both operators deliver strong coverage in CO5, and your choice may come down to tariff, handset preference, or existing contract.
Switching to EE in Mersea
EE has the strongest measured signal here — 91/100, with 100% 5G-grade and 100% 4G coverage across Mersea, Feering, Tiptree and Kelvedon, 13 points clear of the weakest. A cheaper plan on a network that does not reach your street costs more than it saves, so start from the coverage and pick the plan second.
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 Colchester area
View full coverage analysis for the Colchester (CO) area, or enter any UK postcode in the scanner above for a personalised result.
Coverage FAQ — CO5
Q2
Is 5G available in CO5?
EE provides excellent 5G coverage at 100%. O2 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 Vodafone worth considering?
Vodafone scores 79/100 in CO5 (84% 5G, 100% 4G). It may suit certain tariff or price preferences despite trailing the top two.