Mars 2021 —

O2 Mobile: everything you need to know about the operator

Are you searching for a new phone operator in the UK? You are having difficulty finding the right one for you? We have the solution: O2 mobile! 

If you have just moved to the UK and are in need of a mobile operator or are just looking to make a switch from your previous one, O2 mobile might just be the right fit for you. 

In this article, we will provide you with information about O2’s mobile services, phone deals, top-up plans and much more. Does this spike your interest? Read ahead, you’ll get all the details you need regarding O2 mobile and how to top up an O2 phone!

O2 Mobile presentation

O2 Mobile: operator
O2 Mobile

O2 Mobile (previously Cellnet) is the second largest telecommunications services provider in the UK, after EE. 

Officially formed in 1985 with headquarters in Slough, England, O2 was originally created as a joint venture between BT Group and Securidor. However, O2 mobile was bought in 2006 and is now owned by the Telefonica group, a Spanish multinational telecommunications company. O2 Mobile is officially incorporated as Telefonica UK Ltd., however, the owner decided to keep the brand as O2. The company also has two subsidiaries: Giffgaff and 50% of Tesco Mobile. 

O2 Mobile has over 10.000 employees and owns over 450 retail stores across Great Britain and Northern Ireland. 

O2 mobile: how it works 

O2 mobile has over 23 million satisfied customers, which makes it easy to understand why the brand is in the top 3 preferred telecommunications services. O2 runs 2G, 3G, 4G and 5G networks across the UK, as well as operating O2 Wifi. On top of that, O2 Mobile also provides mobile broadband services, Sim Only deals, phone contracts and more. 

You can find out more about their offers directly from their website or you can continue reading this article. We promise, all you need to know is right here! 

O2 mobile phone deals

If you’re not only looking for an operator but also a new phone, O2 mobile has great phone deals. From your most basic models to the newest ones, O2 makes sure that all the devices they sell correspond to the mobile deals they offer. Plus, they are quite a bargain.  

Here are a few details about the O2 mobile phone deals: 

  • There are 10 brands from which you can choose, totaling almost 70 devices. Whether you’re more of an Apple enthusiast or a Samsung fan, you will definitely find the phone you want. Some models from brands such as LG, Huawei, Sony, Doro etc. are also available. 
  • Monthly costs for O2 mobile devices range from £40 to £97. You can also choose to buy from the over 40 reconditioned devices, with monthly costs starting at £20. 
  • There are two types of plans for O2 mobile phones: Pay Monthly or Pay as Go. On the Pay Monthly deal, you can choose a pre-built plan or customize your own, depending on how much you are willing to pay upfront and how much you want to leave for monthly installments. 
  • Choose from the filters available on the website to customize your phone. From the most basic deals to the newest models, compatible with 5G frequencies, you can find a great mobile device for your needs. 

Have you chosen your device but do not know you to top-up your SIM? Check out the section below to find all the details about O2’s Mobile top-up plans! 

Need to top up your O2 mobile?

Go ahead and top up with Monisnap

The easiest way to top up your phone

O2 mobile: how can I top up my phone?

Your O2 SIM card needs a top-up but you don’t yet know how to proceed? We’ll explain everything, step-by-step so that you can easily top-up your mobile and stay connected with your friends and family.

O2 has a wide variety of mobile top-ups, O2 top up card that you can choose from, depending on your needs. Don’t forget you can also use Monisnap (ex Allo), for a quick top-up, easy and secure. 

Here are the detailed types of top-up plans for O2 Mobile. 

O2 Mobile web top-up: 

  • Top up between £10 and £30 online. 
  • Choose the number you wish to top-up and pay by credit or debit card. 
  • You can only pay with a card from a UK bank and registered to a UK address

Auto top-up: 

  • Login to your My O2 account O2 online
  • Choose the amount you want to be topped on your mobile at a certain date or when you run out of credit
  • Input your credit or debit card
  • O2 Mobile automatically tops-up your phone and the payment will appear on your card 

Top-up by phone: 

  • In case you can’t connect to internet, call 4444 free from your O2 mobile
  • Follow the instructions and choose the top-up you need, starting from £10
  • Pay by credit or debit card. You can only pay with a card from a UK bank and registered to a UK address

Top-up abroad:

  • For abroad top-ups for your O2 mobile, follow the same procedure as for regular phone top-ups.
  • In case the country does not allow you to call 4444, simply enter *111*# and then press call
  • All calls are free of charge for this type of top-up

Now that you know all the types of top-ups O2 Mobile can offer, you can make the best informed decision. Continue reading this article to also see how you can login on the My O2 app and how to contact their customer service.

O2 mobile login

Simplify your access to your O2 mobile by creating an account on My O2. You can use My O2 from your browser or your phone app, available on Google Play and Apple Store. 

Using MY O2is easy. In order to login, create an account by following these steps: 

  • Input your personal details: name, phone number, email address 
  • Pick a password and validate your account on your email address  
  • Connect your account 

Once you have followed these instructions, you will be able to log into your account using your email and password. With My O2, you can check your usage and remaining balance, set-up auto top-ups and manage your account. Login today!

O2 mobile contact: reach the customer service 

O2 Mobile: top up deals
O2 Mobile

Good Customer Service is key to ensure customer satisfaction. Fortunately, there are many ways to contact O2 Mobile. We have detailed them all for you. 

Don’t forget to check their help page before reaching for Customer Service, you may find the answer there and save you a lot of time. 

Contact O2 Customer Service by chat:

  • Use the virtual assistant, Aura, on the Contact Us Homepage. 
  • Type down your questions and you will be redirected to the pages concerning your issue 

Contact O2 Mobile by phone:

Depending on your inquiry and the service you are trying to reach, there are multiple phone numbers you can call. 

O2 Mobile Customer Service for Pay Monthly:

  • Call 222 from your O2 Mobile
  • Call 0344 809 0202 from a landline phone
  • Call +44 7860 980 202 from abroad 
  • You can reach the O2 Mobile Customer Service by phone from Monday to Friday, between 8am and 9pm, and on weekends from 8am to 6 pm 

O2 Mobile Customer Service for Pay as you Go:

  • Call 4445 from your O2 Mobile
  • Call 0344 8090222 from a landline phone
  • Call +44 7860 980 202 from abroad 
  • You can reach the O2 Mobile Customer Service by phone from Monday to Friday, between 8am and 9pm, and on weekends from 8am to 6 pm 

O2 Mobile does not provide an email address on which you can contact them. Feel free to use the methods presented above.

Top up in 1mn with Monisnap (ex allo)

O2 Mobile: allo by monisnap deals
O2 Mobile

Do you want to top up a friend’s phone number in just one minute? Use Monisnap (ex Allo)!  

You can purchase mobile top-ups for call credit or mobile data at the exact same fares that you find on O2. Go check the O2 data plan now!

Here’s how it works: 

  • Choose the mobile and the amount you wish to top-up 
  • Pay securely on our platform using your Visa or Mastercard 
  • Enjoy your instantly credited top-up 

As a bonus, for each top-up, mobile or data, you earn one loyalty star. Four stars equal one top-up with zero fees.

Use Monisnap (ex Allo): fast, easy and secure! 

🚨 How can I get my O2 SIM?

To get your O2 SIM, follow this process:

  •       Choose your free SIM on the “Pay as you go” section of O2 website

  •       Wait 1-2 working days for the delivery

You’ll just have to top up your phone and it’ll be done.

🌍 In which countries is O2 mobile available?

O2 mobile is only present in Great Britain and Northern Ireland.

🚀 Can I top up my phone abroad?

Prepaid plans can be recharged from anywhere, just follow the procedure mentioned above. With Allo by Monisnap, you can also top up your phone from anywhere. 


🧭 Can I find the same O2 mobile top-up plans on Allo by Monisnap as on their website?

Exactly! With Monisnap (ex Allo), all the O2 Mobile prepaid plans are available! You can visit our website to discover the offers: clear and easy to understand. Data, texts, calls: all that you need is available and affordable with Monisnap (ex Allo)!

Yannis Rahal

Share article :