Ofcom mobile coverage data · England
Mobile Coverage in Cornwall: 4G, 5G & Best Signal
In Cornwall, 80.1% of premises receive indoor 4G from all four UK mobile networks (EE, O2, Vodafone and Three), and 4G reaches roughly 98.2% from at least one network. Overall, mobile coverage here is mixed — that's 9.1 pts below the UK average for indoor 4G.
What this means in Cornwall
Ofcom measures coverage by how many of the four main networks reach each location. In Cornwall, most addresses have a good choice of networks indoors, but a minority of premises see weaker indoor signal from one or more providers — worth checking your exact postcode before you switch. Around 0.8% of premises are in a likely voice "not-spot" (no reliable indoor calling from any network) — higher than the UK norm, so Wi-Fi Calling is worth enabling here.
5G note: widespread all-network 5G has not yet reached Cornwall. Some networks may still offer 5G in pockets — check your postcode on each operator's map for the latest rollout.
Which network is best in Cornwall?
At area level all four major networks cover a similar share of Cornwall, so there is no single "best" network for everyone — the right choice comes down to your exact address and whether you need the strongest indoor signal, the fastest 5G, or the lowest price. The most reliable way to decide:
- Check your postcode on Ofcom's independent checker — see our guide to the Ofcom mobile coverage checker.
- Compare the big networks directly: EE coverage and O2 coverage (Vodafone and Three publish their own maps too).
- Weak signal indoors? See how to improve mobile signal (Wi-Fi Calling, signal boosters and more).
Got a call from an unknown number in Cornwall?
If you're checking coverage because of nuisance or unknown calls, look up any UK number for free below to see the original Ofcom range holder.
Type the full UK number that starts with Cornwall to see the original Ofcom range holder, the number type, call cost and risk flag — instantly, with no signup.
Explanation
—
Great business mobile deals
Handpicked Vodafone & O2 plans on the latest 5G handsets — while we run your check.
Vodafone & O2 business deals worth a look
Authorised UK partner pricing — latest 5G handsets, EU roaming included.
iPhone 17e 256GB£28.50/mo
Samsung Galaxy A17 5G£16.00/moFAQs — mobile coverage in Cornwall
Is mobile coverage good in Cornwall?
Mobile coverage in Cornwall is mixed. About 80.1% of premises get indoor 4G from all four UK networks (EE, O2, Vodafone and Three), and roughly 98.2% have 4G from at least one network. Coverage at your exact address can still vary, so check your postcode on each network's map.
Does Cornwall have 5G?
Widespread all-network 5G has not yet reached Cornwall, though individual networks may offer 5G in pockets. 4G coverage is well established. Check each operator's map for the latest 5G rollout near you.
Which mobile network is best in Cornwall?
At area level all four major networks cover a similar share of Cornwall, so the best network depends on your exact address, whether you need strong indoor signal or fast 5G, and price. Check your postcode on Ofcom's independent coverage checker and on each operator's own map before switching.
Are there mobile not-spots in Cornwall?
Around 0.8% of premises in Cornwall are in a likely voice not-spot (no reliable indoor calling from any network). Enabling Wi-Fi Calling, which routes calls over your broadband, is the simplest fix in affected homes.
Mobile coverage in nearby areas
Browse mobile coverage for all UK areas →
Coverage figures: Ofcom Connected Nations (Spring 2026 update, data as of January 2026), reported by number of the four UK mobile network operators serving each location. Used under the Open Government Licence v3.0. Predictions are modelled and may differ from real-world signal at a specific address — always check your exact postcode.
