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Compare UK mobile networks and brands

The UK has four mobile networks, but dozens of brands. Knowing whose masts a brand uses is the quickest way to compare coverage, and often to find the same signal for less.

Photo: Jonas Leupe on Unsplash

Networks and mobile brands

The first four cards are the networks that own masts. The rest are brands (MVNOs) that use one of them.

Which network does my provider use? →

Mobile network

EE

Network

One of the UK’s four networks that own their masts; other brands such as BT Mobile run on it.

Type
Network operator
Owner
BT Group
Brands on it
BT Mobile
eSIM
Yes

Mobile network

O2

Network

A UK network operator whose masts also carry giffgaff, Tesco Mobile, Sky Mobile and Virgin Mobile.

Type
Network operator
Owner
Virgin Media O2
Brands on it
giffgaff, Tesco Mobile, Sky Mobile
eSIM
Yes

Mobile network

Vodafone

Network

Merged with Three in 2025 to form VodafoneThree; both brands are still sold separately.

Type
Network operator
Owner
VodafoneThree
Brands on it
VOXI, Lebara, Asda Mobile, Talkmobile
eSIM
Yes

Mobile network

Three

Network

Now part of VodafoneThree; its network also carries Smarty and iD Mobile.

Type
Network operator
Owner
VodafoneThree
Brands on it
Smarty, iD Mobile
eSIM
Yes

SIM only · Monthly rolling

giffgaff

A SIM-only brand with monthly “goodybags” and no long contract, running on O2.

Uses network
O2
Contracts
Mainly 30-day rolling
Owner
Virgin Media O2
Type
MVNO

SIM only

Smarty

A SIM-only brand from Three with straightforward data plans, running on the Three network.

Uses network
Three
Contracts
1-month & longer
Owner
VodafoneThree
Type
MVNO

Phones · SIM only

Tesco Mobile

A joint venture between Tesco and Virgin Media O2, running on the O2 network.

Uses network
O2
Sells
Phones & SIM only
Owner
Tesco / VMO2
Type
MVNO

SIM only

VOXI

Vodafone’s SIM-only brand aimed at younger users, running on the Vodafone network.

Uses network
Vodafone
Contracts
30-day rolling
Owner
VodafoneThree
Type
MVNO

Phones · SIM only

iD Mobile

The Currys-owned mobile brand, running on the Three network.

Uses network
Three
Sells
Phones & SIM only
Owner
Currys
Type
MVNO

SIM only · International

Lebara

A SIM-only brand known for international calling bundles, running on Vodafone.

Uses network
Vodafone
Focus
Calls abroad
Contracts
30-day rolling
Type
MVNO

Phones · SIM only

Sky Mobile

Sky’s mobile brand, which runs on O2 and can roll unused data into a savings pot.

Uses network
O2
Sells
Phones & SIM only
Owner
Sky
Type
MVNO

Phones · SIM only

BT Mobile

BT’s mobile plans run on the EE network, also owned by BT Group.

Uses network
EE
Sells
Phones & SIM only
Owner
BT Group
Type
MVNO

The four UK networks

EE (BT Group), O2 (Virgin Media O2), Vodafone and Three own and run the UK’s mobile masts. Vodafone and Three merged in 2025 to form VodafoneThree and are combining their networks, while still selling under both brands for now. Every other mobile brand rents capacity on one of these networks.

Contract, SIM only or pay as you go?

TypeBest forWatch out for
Phone contractSpreading the cost of a new phoneTotal cost over 24–36 months; device plan and airtime may be split
SIM onlyKeeping your current phone12-month vs 30-day flexibility
Pay as you goLight or occasional usersCredit expiry and bundle rules

Buying the phone outright and pairing it with SIM only is often cheaper over two years. Work out both totals.

Check coverage where you actually are

Coverage claims are national; you care about your home, work and commute. Use each network’s postcode checker and the independent Ofcom checker. Ask neighbours which network works indoors. And remember: a brand gives you its host network’s coverage.

Your rights when you change

  • Text PAC to 65075 to get a code to keep your number, or STAC to 75075 to leave without it. Codes arrive free, by text, within a minute.
  • Your new provider must switch you within one working day of your request.
  • You can’t be charged for notice periods running after your switch date.
  • UK providers can no longer sell locked phones.

Last updated: 14 October 2026

Frequently asked questions

Which UK mobile network has the best coverage?
It depends on where you live and travel. Independent reports and Ofcom’s checker show coverage by area. Check your postcode rather than relying on national claims.
Is a cheaper brand worse than the network itself?
You get the same masts, but some brands have lower priority on busy masts, fewer extras (like roaming or wi-fi calling) or slower 5G. Check what the plan includes.
Do I need 5G?
Not necessarily. 5G can be faster where it’s strong, but good 4G is fine for most tasks. Many SIM-only and contract plans now include 5G at no extra cost.

Find the right connection