Contact o2 Customer Service


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O2 started in the home broadband market in 2007 and a year after; it introduced its mobile broadband service.

In 2006, O2, or Telefonica Europe was formed when the British company united with the Telefónica, a Spanish telecommunications giant. However, the mobile company history spans much further back than this. It was firstly recognized as BT Wireless and later on as BT Cellnet, as the BT’s first mobile network provision service.

However, in 2001 a de-merger happened, the company gotten freedom from BT and relabeled as O2. For 5 years, they kept this freedom status but the latest procurement by Telefónica has faked links between other European telecommunications companies, especially the Czech Republic and Germany.

Sky acquired O2 home broadband business and customer base in 2013 and it no longer sells stable line connections. It still offer 3G and 4G mobile broadband connectivity, though, and is still a huge competitor in the UK mobile phone market.

O2 Customer Service

Their customer service helpline is a UK-based call center that is available 24/7.

It also has the Help page on its official website that gives advices and recommendations on everything from packages, gaming to switching provide.


The mobile broadband bundles include dongles that offer a mobile broadband connectivity for a sole user or MiFis that create mobile broadband connection for various users to connect all together.

Both ultrafast 4G mobile broadband and the 3G mobile, broadband dongles and MiFis are available.

Subscribers who already have 2 dongle or MiFi or who wants a SIM to use in their iPad or Android tablet can register for a SIM only contract.


There is a free Wi-Fi while you areout with O2’s network of thousands of hotspots, the subscribers avail priority booking at venues and reductions on deals and ‘experiences’, along with the opportunity to get lunch for £1 on Mondays.

Pay Monthly Sims

You can save money with sim only deal.
You can choose your device. Which device are you going to use with your new sim? All the sims of it are ready to use in any handset.

Length of Contract

You can choose on how long you want you contract. 12 months or 24 months?

Choose Plan

You can choose the right tariffs for you needs.

Every year, your Pay Monthly sim only tariff will be attuned on your April bill by the Retail Price Index (RPI) rate of inflation publicized in the past February. To have further information, go to the

To know more about Retail Price Index (RPI), visit They use the Retail Price Index (RPI) rate of inflation: Percentage change over 12 months.



Apple iPhone 6s

You can pay monthly from £9.99 upfront and £54.00 per month. It is free next day delivery when you buy before 10pm. It has exclusive tickets, offers and experiences with Priority.

Apple iPhone 6s Plus

Pay monthly from upfront cost of £9.99 and £47.50 a month. It also comes with free insurance on their 20GB and 30GB plans.


With Priority and Radio X, you can get ticket to see you favorite bands 2 days before the public release. From daily extras to extraordinary treats, it is all on Priority and it is only on this company.

The app

You can download it free. My O2 app allows you to check your data allowances and purchase Bolt Ons if you want to. It synchronizes with your phone book so you are able to call and text by name. It shows your 6 months detailed bill history. You can top up or pay your bill on the app. In addition, you can check when you are due to upgrade as well as the apps is available for iPhone, Android and Windows Phone.

Common O2 Support Question Answers

Here are some answers to frequently asked questions we have found answers to when searching the internet. We want to be a helpful resource to help you find a solution fast. We are in no way affiliated or represent O2 and/or O2 customer services. The information that appears on this website has been sourced publicly and we cannot guarantee the accuracy of the content as it may have changed or been updated.

Can I keep my number when I change to O2?

O2 offers you the option of keeping your mobile number if you switch from another mobile network to them.

The process is quite simple. When you leave your old provider you’ll need to ask them for a PAC number, which consists of six numbers and three letters. Please note that once you receive a PAC number it is only valid for 30 days. You’ll then need to fill in a ‘keep my number’ form from O2 which is available on their website. You’ll be given a temporary number by O2 for the first 30 days while they process the switch. Once this sim loses signal, you can then insert your new sim into the phone and restart the handset.

If it’s past 6pm on the day of the switch and your phone still isn’t working, then you’ll need to contact O2 either online or via the O2 phone number above to find out what the problem is. Bear in mind that with multimedia messages it can take more than 24 hours for this service to work after you’ve started receiving an O2 signal.

Why is my bill higher than I expected?

Usually this happens when you use more than your contracted allowance for media, texts, or numbers. There are however other reasons that you can be charged extra. These include using your phone to buy a service, like WiFi on a bus or on a train, making calls from abroad, calling premium rate services, or roaming. Each of these can increase your bill above the usual cost. To find out what has caused your bill to be higher contact the O2 customer service number or visit your account to see the additional charges.

Also, it’s worth remembering that due to inflation, from April 2017, your plan may be updated based on a common inflation index to keep in line with the current rate of inflation.

How do I find out about my bill?

There are many ways to find out about your bill on O2.
If you’re signed up to pay monthly on a contract then you may be automatically registered for a service called My O2. If you’re on Pay As You Go (PAYG) then you may need to register for the My O2 service, which requires your email address, a password, and your O2 number.

When you sign in to My O2 you’ll be able to access a copy of your bill and the payment date, as well as access records from the last half a year online. You can also see how your airtime bill is assessed and calculated.

If you need a hard copy of your bill it’s possible to obtain one, but you may need to call the O2 contact number and pay a small fee to cover the cost, normally 1 GBP for a summary and 1.50 GBP for a more detailed bill.

Otherwise, you can contact the O2 helpline directly to find out details of your bill or to query anything in your bill.

How has roaming changed as of June 2017?

In June 2017 the laws changed for EU telephone calls. From the 15th June, all networks within the European Union have to offer free roaming for calls taking place outside of their country but still in the EU.

There are some countries that aren’t included in this though, and you need to find out which countries are exempted from this before travelling. This doesn’t mean free calls however, your calls may be billed the same as your allowance. To find out more, including the countries you’re visiting and whether free EU roaming applies, you should get in touch with O2 customer care either online or by calling them to find out what rules apply to you.

Can I use O2 Data abroad?

Currently, you can use data without an extra charge in the EU countries listed as not charging roaming. You should keep in mind that O2 does not have a 4G roaming agreement with any other countries, so you may be using either 3G data or slower. This means that data services may take a longer time than they would in the UK.

Does O2 have an App I can use?

O2 offer an App for you to use as long as you have a smartphone that meets the minimum device requirements for either iOS or Android. When you download the app you may need to use a fingerprint or passcode scan to log in. From here you are able to access your allowances, view your ‘bolt on’ additional services, and bills. You can also see when your next bill is due or what recent charges you’ve accumulated. The app can be a huge time saver when you don’t have time to call O2 via phone.

How can I turn off voicemail on O2?

It’s common that customers on O2 find it difficult to turn on or turn off their voicemail.

There is a simple service to allow you to change your voicemail status. Dialing 1750 and pressing send turns on Voicemail, while to turn off Voicemail you can dial 1760 and press sent. If you want to record your own personal greeting then you need to call a number, 901, and you may be presented with a recorded menu. From here you can select the option to record your full voicemail greeting or record a nametag. You can also use this number to change your pin, or retrieve your voicemail messages.

You can also check your messages by dialing 901 on your mobile phone, or even check from a landline by calling your mobile number from a landline when your mobile phone is switched off, and then entering your pin code.

Can I upgrade my handset?

This depends on several factors, including how far you are on your contract and how long is remaining, what kind of contract you’re on, and how much you’re willing to spend to upgrade.

If you’re on ‘O2 Refresh’ you can upgrade whenever you like by paying off the rest of your device plan. If not, visit the upgrades page on the O2 page and sign into ‘My O2’. From here you can see whether you qualify for an upgrade.

Otherwise you may wish to call the O2 telephone number listed above and find out whether your account is eligible for an upgrade and what the circumstances of your contract with O2 are.