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O2 Contact Number

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O2 is one of the UK’s leading mobile digital communication companies in the UK today. O2 runs 2G, 3G and 4G networks through the United Kingdom, as well as functioning 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 workshop to purchase new phone etc. O2 functions in 21 countries and has partner networks in over 40 other countries.

O2 Information - 0844 453 5145

Do you need to contact O2? You can find their contact information below.

O2 Contact Number
Telefonica UK Limited Correspondence Department
PO Box 202
Houghton Regis


Opening Hours
Mon-Fri 8am-9pm | Sat-Sun 9am-5pm
Telephone Number
0844 453 5145
Calls to 084 numbers cost 7p per minute plus your phone company’s access charge.

O2 Reviews - 0844 453 5145

Jason T

2 years ago

Recently switched to o2 from another provider and I have not been massively impressed with their service so far. I have had issues with them transferring my new number, issues with my inclusive allowance and they messed up the direct debit payments. Im starting to regret switching!


O2 News - 0844 453 5145

O2 Customer Services

If you are an existing O2 Customer and if you are looking to manage your account easily. Please check the below help guide about My O2 App and its features by clicking on

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O2 FAQs - 0844 453 5145

Q. How do I join O2?
A. You can join O2 by calling the O2 customer support department on the following O2 telephone number; 0844 453 5145. You can contact O2 Monday to Friday, 8am to 8pm and 8am to 6pm on Saturdays to discuss registration.

Q. How to use O2’s Tu Go when you are abroad?
A. When you are abroad, peoples in your contact can call you via Tu Go by dialing your mobile number as normal. The cost will be same for calls and text if you were in the UK. Calls to International will be charged at usual UK Rate. If you want to avoid these charges, you can switch off your data roaming.

Q. How O2’s Tu Go Works?
A. Tu Go App is a free app that allows you to use our O2 number on smart phones, tablets and laptops. It’s just like using your phone. If you are an existing O2 Tu Go Customer, then you may use this Tu Go App to manage your Tu Go Package easily.

Q. How much costs would be charged through TU Go?
A. Through Tu Go, Calls and Texts would be charged the standard rates as same on your mobile itself. Tu Go App will also use the small amount of data to sync your timeline and voicemail – Ensure you are connected through Wi-Fi and put off your mobile data allowance.

If you want to know more about Tu Go Costs, Contact O2 Customer Services Team on 0844 453 5145. By calling on this O2 customer service number, you will directly speak to one of the O2 Customer service executive to solve your query related to Tu Go Costs.

Q. How to get Text Notification for Tu-Go on your phone?
A. If you are an existing O2 Customers and Looking to get Text Notification for Tu-Go on your phone. You can simply Log in using registered email and password, you will get notification from your phone and another one from TU Go. If you want to stop this notification for TU Go, You can even change these settings – switching Text notifications from ‘on’ to 'off'.

If you are experiencing any issue with TU Go Notifications, then you can call O2 Customer Support Team on 0844 453 5145. An O2 Customer support executive will help you to solve your issues related to Tu Go.

Q. How do I view my O2 bill online?
A. If you would like to contact the O2 Billing department to understand and view your bill within your online account, you can call the O2 customer services team on 0844 453 5145. This will connect you directly with a O2 customer executive who will help you to understand and resolve any O2 billing issues you may have.

Q. How do I find more company details?
A. At Contact 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.

Q. When is it best to contact O2?
A. 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.

Q. How do I make a complaint to O2?
A. Here at Contact 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. I have been expecting a call back and several days have passed - what should I do?
A. Depending on what they've told you - get on the phone if you think it's been too long! It might be that they're backlogged or have even misplaced your query. It's best to find out what the hold-up is before you take further action. you should call again on O2 customer services team on 0844 453 5145 and specify your problems.

Q. How much time should it take to resolve the query?
A. it should normally take less than a week to resolve a problems. O2 customer services aim to get your problem solved as quickly as possible - but if they don't, you can directly speak with a O2 customer service executive by calling on 0844 453 5145.

O2 Help Guides - 0844 453 5145

Help guide on how to get started with TU Go App

If you are a current O2 TU Go Customer and want to know how to get started with TU Go App. You may see the below Help Guide for more in detailed:

What is TU Go?

TU Go is a free app Launched by O2. It allows you to text call and you can also check your voicemail using Wi-Fi. Even if you don’t have signal.

Features of TU Go app:

  1. With the help of TU Go App, you can do the following:
  2. You can calls, text to anyone in your phone contact using Wi-Fi.
  3. You can check voicemail when you don’t have a signal.
  4. Connect over Wi-Fi when you are abroad, call and text at UK Standard rates.
  5. You can also get your calls in your Laptop, Tablet or Computer when your phone is out of battery. 

How to get started and download TU Go App?  

If you are interested to get started and download TU Go App, Follow the below steps: 

Firstly, check your device:  TU Go App is available on:

  1. iPhone, iPad and iPod Touch (with iOS 7 or Higher)
  2. Android and Tablets (with Android 4.0 and latest)
  3. Windows Phone
  4. Personal Computer (Windows 7, 8 and 8.1)
  5. Desktop browser using latest version of chrome/Firefox. 

Download TU Go app:

You can download TU Go App for free now. O2 will send you text to get started with your O2 Customer Account. TU Go is currently available for pay monthly and for Business customers. You can download TU Go App from the available Mobile Platforms:

IPhone: Apple App Store

Android: Google Play Store

Windows Phone: Microsoft Store for Mobile.

Windows for PC:  Microsoft Store for PC

Create an O2 Customer Account:

Tap Register to start creating your O2 account now. You will need to be able to receive text to sign up, so ensure you have got signal and keep your phone on hands. Signing up for TU Go will automatically make some changes to your O2 Account- We make sure voicemail is transferred on for your phone number.  

Watch the Official Video on TU Go App: 

Disclaimer: Calls are charged at 7p per minute. Contact numbers is UK’s local phone book directory service which connects you to O2 Customer Support department. This site is not affiliated with O2.

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