O2 Telephone Number 0844 800 3125

O2 Contact Number 0844 800 3125

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To speak to a member of the O2 customer service team, simply call 0844 800 3125 today. This phone number will put you through to O2’s automated menu system, where you can choose the options most relevant to you. Please listen to the call carefully in order to be connected to the right department.

O2 Contact Number 0844 800 3125

O2 are one of the UK’s leading mobile network providers. The company was originally formed in 1985 as a 60:40 venture between BT Group and Securicor, however O2 has changed considerably since then. The business was sold to Telefonica, a Spanish communications company, for £18 billion in 2005 and in 2015 the company was again sold on – subject to regulatory approval –  this time to Hutchison Whampoa for an estimated £10.5 billion. Over the last five years, O2 has invested considerably in their 4G and Wi-Fi networks.

O2 Contact Numbers

As one of the UK’s leading networks, O2 has millions of customers. These customers enjoy a wide range of services, including pay-as-you-go handsets, pay monthly phones and tablet computers, 3G and 4G LTE as well as Wi-Fi. If you are an O2 customer and you require support or you have an enquiry related to your account, then you can call O2 using the contact number 0844 800 3125. This O2 phone number will put you through to a customer service assistant quickly. Simply follow the steps provided by your phone.

If you would rather write to O2 or contact them on social media, the following information will help:

O2 contact information

Website: http://www.o2.co.uk/


260 Bath Road,
SL1 4DX.

Social media:


O2 customer service phone number 0844 800 3125

O2 operates a vast network of customer service departments; the majority of their customer service is UK-based however some is outsourced abroad. Regardless of who you are connected to, O2 is committed to providing the best customer service possible. Call 0844 800 3125 today to speak to an O2 customer service advisor.

Making the most of your communication with O2

If you are calling O2 on the telephone, you should have your customer number or agreement to hand, as well as the mobile phone number related to your account. It is also a good idea to write down any answers to secret questions, to speed up the identification process. If you are writing to O2, we strongly recommend you send any communication by recorded delivery or any delivery method that requires a signature, so that you can confirm receipt. If you are contacting O2 on social media, then you should also consider emailing O2. Ask O2 to send you an email address privately – this way you can be sure that your enquiry will be dealt with by the right person.

I would like to make a complaint about O2. How do I do that?

The first step to making a complaint is to call O2 and express your concerns. O2 has an escalation process so the first person you speak to may not be the best person. It’s best to ask to speak to a manager, or request a call back from a manager, to have your complaint heard. It is also advisable to write to O2 to make a complaint and using the tip above, to send your letter via a delivery method that requires a signature. If you are dissatisfied by the way your complaint has been handled, then you can ask the Ombudsman to investigate. Here’s their address:

Ombudsman Services: Communications,
PO Box 730,
WA4 6WU.