O2 Review 2020: Get discounts, offers and free prize draws with O2’s priority awards scheme!

O2 is one of the big four Mobile Network Operators and has 99% 4G coverage across the UK. Read on below to get Half Cooked’s full breakdown.

Mar 11th, 2020

Latest Offer: 100GB (4G) or (5G) for just £25!

O2 is currently offering customers 100 GB (4G) or (5G) data with unlimited minutes and texts for £25 a month. Theres are also the unlimited (4G) and (5G) data offers with unlimited minutes and texts for £35 a month. These deals offer great value since the minutes and texts which are included in tariff can be used in UK but also when roaming in Europe Zone.




  • O2 Priority app can save you £ every week with great offers
  • Over 7000 Wi-Fi Hotspots in the UK
  • 99% 4G coverage and fast speeds



  • Data Rollover only on Pay As You Go
  • No Free subscription services


Half Cooked’s overall rating for O2: 4 out of 5 stars (4 / 5)


O2 Mobile Review

O2 have always been synonymous with quality when it comes to the UK mobile industry and as a result you can expect to be paying slightly more than for some of the other networks. With that you will get access to O2 priority which has the best customer offers in the market including weekly savings such as cheap meal deals and discounts at popular high street brands. On top of this O2 get the basics right with 99% 4G coverage.

However, a lot of the other networks have started to offer alternative customer perks including free entertainment subscriptions to popular services such as Apple Music and free streaming with apps such as Netflix. O2 is being left behind by not offering this additional value to customers and with their high price point half cooked gives them a rating of 4/5.

Click here to go direct to O2’s website and see their latest SIM offers.

Skip to the half cooked breakdown to find out how O2 performed in each of our main categories by clicking here. 

Otherwise read on for our full review or skip to a specific section from choosing from the table of contents below.

Table of Contents

Network Coverage & Speeds 3 out of 5 stars (3 / 5)

O2 Mobile Network Speed O2 is one of the big 4 MNO’s (Mobile Network Operators) in the UK alongside EE, Three and Vodafone. All the rest of the networks piggyback off of these networks to provide customers with service.

Per Open Signal for H2 2018 O2 is tracking behind EE & Three in terms of data speeds with an average download speed on 4G of 15 MB/s vs EE who leads the way with 28MB/s.

However, O2 won the uSwitch mobile awards for 2018 for best network coverage. O2 also recently invested further into rolling out its 4G coverage, with 4G coverage for 99% of the population indoors now available.

Find out more about O2’s Network Coverage

Voice Call Quality 2 out of 5 stars (2 / 5)

O2 Mobile Voice Quality

You shouldn’t have a problem with making calls but O2’s voice call quality is unfortunately tracking behind its competitors.

In tests run by P3 communications, O2 came last out of the major operators with a score of ‘satisfactory’. O2 has launched 4G calling which should help boost this score – as long as you have a 4G enabled device you will have access to O2’s 4G calling.

Find out more about O2’s Voice Call Quality

Tethering 5 out of 5 stars (5 / 5)

O2 Mobile Tethering

Tethering is turning your mobile device into a personal Wi-Fi hotspot which in turn allows your data to be used by other Wi-Fi devices to access the internet.

Customers tend to burn through their data allowance quickly and a lot of networks limit this on higher data plans to reduce the data traffic on their networks.

O2 however performs highly in this category. Unlike many of its competitors O2 allows all customers, regardless of whether they are on a PAYG or Contract SIM / Handset plan to use their data however they wish whether that be on their mobile device or tethering to another Wi-Fi enabled device.

Find out more about O2’s Tethering

International Roaming 4 out of 5 stars (4 / 5)

O2 Mobile International Roaming

With the change in EU regulations in June 2017, all 48 EU countries are now included on all plans regardless of whether they are contract pay monthly or PAYG.

Being a regulation change this is the norm for all operators that offer roaming, but O2 go one step further and now offer roaming in additional countries.

O2 now offer O2 travel which has in total 75 countries (27 above and beyond the 48 inclusive EU countries) to roam in, including USA, United Arab Emirates & Thailand. To be eligible to receive O2 travel you need to be a on a 12-month SIM plan that costs £20 or more a month or one of O2 refresh tariffs with 15GB or more data usage.

If you are travelling somewhere outside of the 75 destinations you can purchase a daily bolt on for £4.99 which will give you 120 minutes, 120 texts & all the data you need.

Find out more about O2’s International Roaming

Wi-Fi Calling & Wi-Fi Hotspots 3 out of 5 stars (3 / 5)

O2 WiFi Calling

Wi-Fi calling allows customers to place calls and send texts using wireless networks instead of using their 3G/4G network. This is a great perk if you are somewhere without mobile connection but have access to Wi-Fi.

O2’s Wi-Fi Calling proposition isn’t the strongest in the market. Unlike other networks such as Three’s, which works automatically on almost all handsets, O2’s is limited and in some cases only works with handsets purchased from O2.

Where O2 does perform well is with their Wi-Fi hotspots. Any O2 customers with a compatible device and an O2 SIM has access to 7,000 O2 Wi-Fi Extra hotspots and once you have connected at one location you will be automatically connected to any other O2 W-Fi location once in range.

Wi-Fi hotspots on O2 are found in a lot of popular restaurants and shops such as Costa, McDonalds & Debenhams which will help O2 customers save on their data package when out and about.

Find out more about O2’s Wi-Fi Calling & Wi-Fi Hotspots

Data Rollover 2 out of 5 stars (2 / 5)

O2 Mobile Data Rollover

Data rollover is a popular perk being offered by several different operators now as customers data usage can change from month to month. This means you can roll your unused data from one month to the next. I.e. if you have a 2GB plan and only use 1GB the following month you will have 3GB of data.

O2 currently only offer data rollover on PAYG and on none of its contract handset or SIM only plans. Data rollover on PAYG with O2 is only available on their Big Bundles plans, coming with a couple of caveats.

O2 PAYG customers have to top up before their plan ends to get data rollover and the rollover is limited depending on which plan you are on. The Big Bundle £15 for 5GB caps the amount you can rollover to 10GB and the Big Bundle £25 for 8GB limits rollover to 16GB per month.

Multi Buy Discounts/ Family Plans 4 out of 5 stars (4 / 5)

O2 Mobile Multi Buy Discounts

Some networks are now offering customers discounts on any additional SIM or phone contract purchases they make to incentivise people to sign up their family & friends.

O2 have tried to tackle this new perk in the market through two propositions – O2 Sharer Plans & O2 Family Plans.

O2 Sharer Plans allow O2 customers to share their data allowances across multiple O2 devices. As long as you have a phone or tablet with an O2.

Refresh SIM with 1GB of data or more, this data can then be shared with up to 9 different devices with O2 SIM’s.

O2’s Family Plans offer up to 50% off if you have multiple plans with O2. Each additional plan added comes with an improved discount, these aren’t however eligible on PAYG or Business tariffs and all the customers need to be signed up to the same address as the original plan.

Find out more about O2’s Multi Buy Discounts & Family Plans

Customer Rewards 5 out of 5 stars (5 / 5)

O2 Mobile Customer Rewards

With so many network options in the market for customers a number of the operators offer loyalty schemes in the form of customer rewards such as freebies. O2 has been doing this for a while through O2 priority.

Available to all O2 customers regardless of whether you are on a pay as you go or pay monthly plan – O2 priority provides customers with discounts at shops & restaurants, such as free coffees. They also provide customers with exclusive access to purchase tickets for gigs/events up to 48 hours before general sales.

With such a vast array of deals available on O2 priority you can be making savings every week and at the moment none of the other networks have the number of deals available that the 20 million plus O2 priority users can take advantage of.

Find out more about O2’s Customer Rewards

Other Perks 1 out of 5 stars (1 / 5)

O2 Mobile Other Perks

With the mobile market becoming more and more saturated with new networks popping up, some of these operators are trying to differentiate themselves by offering other perks.

Unfortunately, O2 doesn’t offer any complimentary entertainment subscriptions that you may find with some of their competitors. EE lead the way offering a 6-month subscription to Apple Music & access to the BT Sport app to its pay monthly customers for e.g.

They also fall flat on any data saving offers. Three with their ‘Go Binge’ proposition offers unlimited usage of certain apps which include Netflix, Snapchat & Apple Music. Another good offering is from Virgin who offer unlimited use of messaging applications such as WhatsApp, Twitter & Facebook Messenger – but you won’t find anything of the kind for O2. With the larger competitors in the market offering these sort of perks O2 is tracking behind.

Find out more about O2’s Perks

SIM Deals & Phone Contracts

O2 have 11 SIM only deals for customers ranging from £13 for 1GB of data, to £30 for 50GB. Any plans that are £20 or more come with 75 roaming destinations per O2 travel.

In terms of O2’s phone contracts, these split the cost of the device and the cost of the airtime so that customers have the option to pay off their phone whenever they want. This is called O2 refresh.

In terms of available phone contracts 02 have now introduced their custom plans which allows customers to build their plans to suit their needs. This means customers can create contracts with terms between 3 – 36 months and with/without an upfront cost and as much data as needed.

O2 have tried to remain transparent with their pricing and the cost of the device won’t change regardless of the contract length you input and the cost of the data and minutes also is consistent.

Find out more about O2’s SIM Deals & Phone Contracts

Half Cooked Overall Breakdown

Half Cooked’s overall rating for O24 out of 5 stars (4 / 5)

O2 Mobile Review


  • Network Coverage and Speeds 3 out of 5 stars – With 99% 4G coverage, on O2 you wont be short of coverage but their speeds are behind those of EE & Three.
  • Voice Call Quality 3 out of 5 stars – P3 Comms rated voice call quality as ‘Satisfactory’ tracking behind all the other major operators.
  • Tethering 5 out of 5 stars – Unlike many of its competitors O2 does not limit tethering on any plans.
  • International Roaming 4 out of 5 stars – Great proposition which allows customers to roam in 27 additional countries above and beyond EU destinations but let down that it is only available on the higher end plans.
  • Wi-Fi Calling & Wi-Fi Hotspots 3 out of 5 stars – Wi-Fi calling not as simple as some of the other operators but 7,000 O2 Extra Wi-Fi hotspots means you can save on data in a lot of public locations.
  • Data Rollover 2 out of 5 stars – Currently only available on O2 PAYG plans.
  • Multi Buy Discounts/ Family Plans 4 out of 5 stars– Multi Buy discounts available that could help you save up to 50% on additional plans.
  • Customer Rewards 5 out of 5 stars– O2 Priority has been around for a while but remains the strongest in terms of customer offers.
  • Other Perks 1 out of 5 stars– Other perks limited compared to some of their competitors.