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Updated: 20 Apr 2022

Three mobile review

Three is one of the big four mobile networks and heavily promotes its data-heavy phone deals. Are these enough to satisfy its customers?
Adam Snook
Three mobile logo

Before signing up for a new phone deal, read our review of Three to see how it scored in our exclusive mobile network customer satisfaction survey.

How good is Three mobile?

 We spoke to more than 3,300 real customers from 16 of the biggest phone providers, including EE, O2, Vodafone and Three. They told us exactly what they thought of their phone company, from the customer service on offer to the value for money they get.

In this in-depth review of Three mobile, we'll:

  • give you a full breakdown of how its customers rated it for key factors, including customer service, value for money and incentives.
  • report quotes from real Three mobile customers on their experiences.
  • tell you whether it's a Which? Recommended Provider.

Only logged-in Which? members can view the results in the table below. If you’re not yet a member, you can get instant access by joining Which? today.

Browse all of Three's Sim-only deals at Which? Switch Mobile.  

Three customer satisfaction survey results
Recommended ProviderValue for moneyCustomer serviceNetwork reliabilityDownload speedsCustomer score

Table notes: Results based on an online survey of 3,305 members of the public in January and February 2022.

How good is Three's mobile coverage?

Three offers 3G, 4G and 5G coverage, although its lack of a 2G network means that if there's no 3G signal, then calls will drop out (this isn't the case for EE, O2 or Vodafone).

In our latest analysis of 4G phone coverage, performed in conjunction with coverage experts RootMetrics, we found that the download speeds offered by Three lag far behind the speeds EE and Vodafone customers experience, although overall performance is a closer contest.

You can check coverage where you live by using our mobile network coverage map. Simply enter your postcode into the map and it will tell you how good Three's signal is in your area, as well as comparing it with the other providers.

Three's mobile deals and incentives

Three's pay-monthly deals are aimed at people who want to surf the web on their phone, and all come with a data package, ranging from 1GB to an unlimited allowance.

Giving you unlimited data isn't as rare as it used to be but Three includes 5G usage in all plans over 4GB, and this makes Three an appealing option if you're a very heavy user. 

Three has decreased its range of benefits in recent years but still offer 'Go Roam Around The World', which gives you access to up to 12GB of data and unlimited minutes and texts to UK and EU numbers.

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

Three stores

Three is a well-established mobile network and has 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 influenced 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.