Three mobile review

Three is one of the UK's big four mobile network providers, offering a range of mobile phone contracts and Sim deals. How did its customers rate it?

Before signing up for a new phone deal, read our review of Three to see how it did in our regular mobile phone satisfaction survey.

Discover which mobile network providers impressed their customers most in our latest survey, which reveals the best and worst mobile networks. 

What Three's customers told us

• 'They need to communicate why there is so many issues with the signal and why the lines go down so regularly. Nobody could ring me all of yesterday - I couldn’t make or receive calls all day - but received no information or apologies from the network provider.'
• 'Network has been bad recently everywhere.'

Three mobile review

Customer score: 63% (16th out of 16). Which? members can also read our full review, including how its customers rated it for key factors, such as customer service and network reliability.

If you're already a member, log in now, or join Which? today.

• Pros
• Cons
• Which? Verdict

Browse all of Three's Sim-only deals, or check our expert picks of the best Sim-only deals.

Compare mobile phone and Sim-only deals today

Get a great deal on a mobile phone contract, or browse Sim-only deals starting from around just £5 a month

See how much you could save

How good is Three's mobile coverage?

You can check coverage where you live by using a mobile network coverage checker. Enter your postcode into a map, and it will tell you how good Three's signal is in your area, and compare it with the other providers.

Three mobile Sim-only deals

Three's pay-monthly deals come with a data package ranging from 1GB to an unlimited allowance. View a selection of deals below and click 'Show More' to browse.

Other Three mobile deals and incentives

Three has decreased its range of benefits but offers Go Roam Around The World, which gives you access to up to 12GB of data for £2 in the EU or £5 a day in the rest of the world. 

Compare the best Three Sim-only deals and see how much you could save.

Does Three increase its prices each year?

Yes.

Customers who joined or upgraded on or after 8th September 2024 will face fixed mid-contract price increases every April, outlined in pounds and pence at the start of the contract:

Legacy customers who joined prior to the new style of price increases in April, of the previous December's (published in January) Consumer Price Index rate of inflation, plus 3.9%.

To find out how to avoid costly price increases, read our guide to 10 ways to save money on your mobile phone bill.

Three stores

Three is a well-established mobile network with a physical presence on many UK high streets – you can find your nearest shop using the Three store locator.

Alternatively, you can get help and advice by calling Three's customer services on 333 (from a Three mobile phone) or 0333 338 1001.

Find out how other providers fared in our guide to the best and worst mobile networks. 

Recommendations you can trust

Which? is independent – we work for you, the consumer, so you can be sure that our recommendations are only influenced by our test and survey results. We're not swayed by third parties, and we don't accept freebies from product manufacturers or retailers. We buy all the products that we test ourselves, so our advice helps you to make the right choice first time and avoid costly mistakes.