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Mobile phone provider reviews

O2 mobile review

By Hamse Yusuf

Article 6 of 13

Put us to the test

Our Test Labs compare features and prices on a range of products. Try Which? to unlock our reviews. You'll instantly be able to compare our test scores, so you can make sure you don't get stuck with a Don't Buy.

We regularly survey thousands of mobile phone customers so we can tell you exactly how O2 compares to other mobile phone providers.

How good is O2 mobile? 2019 Which? mobile provider satisfaction survey

Before signing up for a new phone deal, read our review of O2 to see how it did in our regular mobile phone satisfaction survey.

In our latest survey we spoke to more than 6,100 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.

O2 customer satisfaction survey results
Recommended Provider Customer service Ease of contacting Value for money Incentives Customer score
Subscriber only content Subscriber only content Subscriber only content Subscriber only content Subscriber only content Subscriber only content
Table notes: Ratings and scores based on a survey of Which? members in January and February 2019.

In this in-depth review of O2 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 O2 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.

How good is O2's mobile coverage?

O2 has its own network and offers 2G, 3G and 4G coverage.

In our latest analysis of  3G and 4G phone coverage, performed in conjunction with coverage experts OpenSignal, we found that O2 customers are able to access a 4G signal 83% of the time - second only to EE (87% access) continuing to improve since our last assessment in 2017. 

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 free interactive coverage map. Simply enter your postcode into the map and it will tell you how good O2's signal is in your area, as well as comparing it with the other providers.

O2's deals and incentives

O2 splits its pay-monthly 'Refresh' packages so you'll actually be signed up for two deals – one for your minutes, texts and data (the airtime plan) and one for the cost of your phone handset (the phone plan).

Once you've paid for a handset (at the end of your contract), your bill is automatically reduced. In contrast, most other providers will keep you on a higher tariff until you tell them to switch, even when you've paid off your phone - a practice we don't think is fair. Refresh also lets you easily upgrade to another phone by simply paying off the balance owed on your existing handset.

O2 charges 3p/minute, 2p/text and 1p/MB for its pay-as-you-go (PAYG) deals. You can also buy bundles - for example, paying £15/month for 1000 minutes, 5,000 texts and 5GB of data.

O2 is also known for offering perks, including O2 Priority. This gives customers access to a range of offers, including pre-sale tickets. There is also O2 Rewards for PAYG customers, which gives you a percentage of your quarterly spend on credit.

O2 stores

O2 is one of the UK's biggest mobile phone providers and has hundreds of high street stores, many of which offer technical support from the company's 'O2 Gurus'.

You can find your nearest branch using the O2 store locator or by calling O2's customer service on 202 (from an O2 mobile) or 0344 809 0202.

Complaints about O2

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

In its latest report, covering the third quarter of 2018 (July to September), O2 generated a very low level of complaints – three per 100,000. While it can't quite match Tesco Mobile's rate (one per 100,000 customers), it's far below the level of complaints generated by Virgin Mobile (11 per 100,000).

Read in-depth reviews of all the major phone networks in our mobile phone providers guide.

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.

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