O2 Contact Number

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0844 453 3558
Calls cost 7p per minute plus your phone company’s access charge. This is a call connection service and connects you to customer service department of your choice.
Company Details
Postal address, email, opening times, everything you need to create a written complaint.

O2 Customer Support,
Telefonica UK Limited Correspondence Department
PO Box 202 Houghton Regis, LU6 9AG
O2 Opening Times : Mon-Fri 8am-9pm | Sat-Sun 9am-5pm

Tel: 0844 453 3558

Calls are charged at 7p per minute plus your phone company’s access charge. This is a connection service and connects you to O2 customer service department. This site is not affiliated with O2 , read more about our service here.
About O2

Introduction to O2


O2 Contact Number

O2 is a UK’s leading digital communications company with over 23 million customers. It runs 2G, 3G and 4G networks through the UK, as well as working O2 Wi-Fi and keeping half of Tesco Mobile. There are over 450 o2 retail stores and their service offerings also comprise broadband and an online shop to purchase handsets and much more.


O2 is a British telecom company headquartered in London and its registered office is in Telefonica UK Limited Correspondence Department, PO Box 202 Houghton Regis, LU6 9AG. O2 Operates in 21 countries and has partner networks in over 40 other countries.


Here are some reasons to Call O2 Contact Number:-


O2 Technical Support:


With the help of O2 Helpline - 0844 453 3558, you can get full assistance to get your mobile phone working


O2 Account Administration:


If you are an existing O2 Customer and want to make changes to your customer account, you can call O2 Contact Number on 0844 453 3558.

O2 Upgrades:


Call O2 support number - 0844 453 3558 to discuss about upgrading your handset with one of the O2 customer support department.


Disclaimer: Calls are charged at 7p per minute. Support Phone Numbers is UK’s Call Connection services and connects you to O2 customer support department. This site is not affiliated with O2. If you want to find out more about O2 and its products and services, you can click here to view their Official website.

O2 Customer Service FAQs
  • Q : How can I contact O2 Customer Service?
  • Ans :The quickest way to contact O2 is by using the telephone number at the top of the page. However, we have listed their address and website too if you’d like to try contacting them that way.
  • Q : How do I make a complaint to O2?
  • Ans :Here at Support Phone Numbers we recommend putting your complaint in writing to O2. A telephone call, followed by a written complaint could help your query be resolved more quickly. What’s more, you’ll have a written record of your communication with O2 for future reference should you need it.
  • Q : When is it best to contact O2?
  • Ans :The peak time for most companies receiving calls is around 5-6pm, so try and avoid lengthy call queues by contacting them during the day if possible. However, the full opening hours for O2 are Mon-Fri 8am-9pm | Sat-Sun 9am-5pm.
  • Q : How do I find more company details?
  • Ans :At Support Phone Numbers, we've listed a wide range of companies alongside their full contact details so that you don't have to scour the web for hours! Using our easy to navigate website you can quickly search for Customer Service details and live chat too! Simply enter the O2 you’re looking for and follow the instructions on screen.
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