We use cookies to allow us and selected partners to improve your experience and our advertising. By continuing to browse you consent to our use of cookies. You can understand more and change your cookies preferences here.

Coronavirus Read our latest advice
Reviews based on facts
Our rigorous tests find the facts, and our impartial reviews tell you the truth about how products perform. First month £5, then £9.99 per month, cancel anytime.
Try Which?

When you click on a retailer link on our site, we may earn affiliate commission to help fund our not-for-profit mission.Find out more.

21 January 2021

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?
Hamse Yusuf

How good is Three? 2020 Which? mobile network satisfaction survey

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.

 We spoke to more than 4,000 real customers from 13 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 byjoining Which?today.

Three customer satisfaction survey results
Recommended Provider Customer service Ease of contacting Value for money Incentives Customer score
Table notes: Results based on an online survey of 4,027 members of the public in February and March 2020.

How good is Three's mobile coverage?

Three offers 3G, 4G and, more recently, 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.

Read the full analysis in our guide, Which mobile phone network has the best coverage?.

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 4GB to an unlimited allowance.

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

All Three Sims that have more than 12GB come with Go Binge, which allows you to use certain apps such as Netflix and Apple Music without using up your data.   

Three recently refreshed its pay-as-you-go offering, with data costing 5p per MB, and both minutes and texts costing 10p (although bundled top-up packs are available.)

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 300 3333.

Complaints about Three

Telecoms regulator Ofcom regularly publishes information on the number of complaints it gets about the main mobile networks.

In its latest report, covering the third quarter of 2019 (July to September), Three generated an average level of complaints – four per 100,000. While it can't match Tesco Mobile's incredibly low rate (one per 100,000 customers), it's lower than the number of complaints generated by the worst offenders, Vodafone and Virgin Mobile (seven per 100,000).

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 don't take advertising and we buy all the products that we test ourselves.