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. So, 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 customer satisfaction survey of mobile network providers.

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

Is Three mobile any good?

• 'Does not include EU and international roaming. That's why I am thinking of leaving. I travel a lot and can't afford the extra daily charge.'
• 'They should reduce the price of data packages. There are competitors offering significantly lower prices but with just as good, if not better, reception and connection.'

Three mobile review

Customer score: 65% (15th out of 15). 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.

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

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How good is Three mobile coverage?

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

Three mobile Sim-only deals

Three 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.

Does Three increase its prices each year?

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

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

Does Three mobile include free data roaming?

It depends which type of contract you have:

• Lite plans do not include roaming. To use your data in the EU you must buy a Go Roam pass for £2 a day. If you are going further away, Around the World and Around the World Extra cost £5 and £7 a day respectively. 
• Value plans include Go Roam Europe, which allows free roaming in 49 countries. 
• Complete plans include Go Roam Europe, Around The World and Around The World Extra, making roaming free in 160 countries. 

All plans have a roaming fair usage limit of 12GB.

However, always check to see if the country you’re travelling to is covered before you leave. Some countries you might expect to be included may not be. Use the Three roaming rate finder to see how much roaming might cost. 

It may be cheaper to buy a travel eSim for your trip, rather than relying on data add-ons or PAYG. Find out how to do this and what’s available in our guide to the best cheap eSims for mobile roaming abroad.

For more details and tips for roaming, read how to save money on mobile roaming charges.

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 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.