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O2 UK Overview
When you’re ready to buy a new phone or upgrade your internet speed or features, you want to go with a service that offers the most features and is one of the best in the world. Consider O2 UK, which is a privately owned telecommunications firm with locations in the United Kingdom. It is owned and operated by John Carrington and is located in Slough, Berkshire, United Kingdom. The company O2 began in 1985, has about 21,000 employees and is part of the Telefonica parent company. It began as a way to merge internet, financial services, and phone together to be utilized in the UK.

The services, features and products that O2 UK offers include their popular pay as you go service, internet service, mobile phones service and popular ‘no contract’ featured plans per month. They offer ever increasing broadband service and are doing more work in setting up fibre optic broadband for internet via cable service. This means, if you have an O2 phone number, you may want to combine your plan with your cable company to get a greater savings package and lower your monthly costs. Other popular features include a mobile wallet application or app that can help with bill payments and allow you to readily access your money.

Contact O2 UK
To reach O2 UK, there are several options to reaching them via the internet. If you would like online support and want to hear about their new products, phones, and features, you can visit their website with the web address www.O2.co.uk, or you can contact them at an O2 phone number, 011 44 131 669 8715 in Edinburgh, or 011 44 141 332 6153 in Glasgow.

O2 UK Contact Tips
As the website doesn’t list the phone numbers readily, we found that you can reach an O2 representative by calling one of their main stores. If you want to reach them via Telefonica, you will have to leave a message or email and have someone reply back to you. If you call a store location though, you’re guaranteed to get help right away, Monday through Friday or Saturday with store hours anywhere from 10:00 am to mid evening closures depending on the location. They can help with any customer service type issues or you can try calling the O2 phone number after hours to see if it forwards to their main Telefonica location and access common features through the voice prompted system for help with your bill or to reach technical support.


  • I need help with my 02 SIM.

Do kind of help do you need? Do you need to activate your SIM? Do you want to order a replacement? Or you need help with how to swap your SIM? They have got you covered. You will find all the information you need below;


If you are a ‘Pay Monthly Customer’ and new to O2, your SIM is ready to use straight away you just need to pop it in your device, and you are all set to go.

For – Pay As You Go Customers; you will need to top up to activate it.

If you are an already Existing Customer and you have upgraded your device, you might need a different sized SIM. They will give you a new SIM, and you will still be able to keep your contact and existing number.

Note; if you wish to pop into the store to exchange your SIM but, remember to bring your passport or driving licence with you as ID.

  • How to get the right sized SIM?

There are three types of SIM, and they come in three different sizes such as; Standard, Micro and Nano SIM. The SIMS that are sent by O2 have perforated edges so that you can just pop out the size as per your needs.  However, if you are not sure which size you require, have a look at the instructions that came with your device.

Tip: We recommend you not to cut your old SIM to downsize as it could get stuck or break inside your device. In case, you want to use your nano or micro SIM as a standard SIM in an older device, then grab your free adaptor from an O2 store.

  • How do I upgrade or swap my SIM?

Before you start with swapping or upgrading your SIM, make sure you save contacts from your old or previous SIM card so that you don’t have to lose them. If you need help saving or restoring contacts from a SIM, you can book an appointment with a 02 guru.

So, this is what you must do to swap your SIM; text SWAP to 20220 or follow the instructions below;

  • Open the swap my SIM page and enter your mobile number in the box provided.
  • After the first step, they will send you a six digit code by text. You are required to enter that 6 digit code in the provided box.
  • Find the serial number for your new SIM. You will get the same on the back side of the SIM card. It’s an extended number of the list that beginning with 8944. Then, enter your serial number in the box provided.

SIM swaps take up to 24 hours to complete. Once you drop signal with your original SIM, turn your device off. Then, put the new SIM and turn on the device. Turn your device off and on until you receive signal. You’re ready to go.


  • How to unlock O2 mobile to use on a different network?


If you’re on a Monthly Pay tariff, you could ask them to unlock your phone or tablet at any time and that too at no cost. Though this won’t affect your contract, you will still need to see out the rest of it, depending on your tariff and device.

The perfect way to unlock your phone or tablet is by using My O2 online or via the main menu of the My O2 app. The moment it gets unlocked, they will text you to let you know.

However, if you have got an iPhone or an iPad, you will need to connect it to iTunes once you have put a non O2 SIM into the device. ITunes will then tell you the phone or tablet is unlocked. And, for all other phones and tablets, you will receive a text from them with an unlocking code. You just need to enter this into your device and follow the instructions.


If you’re on Pay As You Go, your O2 phone or tablet can be unlocked at any time, for free.

The quickest and easiest way to unlock your phone is by using My O2 online or via the main menu of the My O2 app. If you are not registered for My O2 yet, then Sign up now. They will text you to inform you when they have unlocked your phone.

However, if you’ve got an iPhone or iPad, you’ll need to connect it to iTunes once you’ve put a non-O2 sim into the device. iTunes will then tell you the phone is unlocked.

For all other phones and tablets, you will receive a text from the O2 team with an unlocking code. You are advised to enter into your device and follow the instructions.


If you have a busines account with O2 and you are the main account holder in that case you can ask for your devices to be unlocked at any time. But don’t forget that you will still need to see out the minimum term of your contract even if you place a SIM into your phone that is non-O2.

Note; if you want to get your phone unlocked, you will have to complete their online form. Once they accept your request they will email you within seven business days with the details on how to unlock your phone.

If you’ve asked them to unlock an iPhone or iPad, you’ll need to put a non-O2 sim into the device and connect it to iTunes. iTunes will then tell you the phone or tablet is unlocked.

If you’re not sure about any techy terms, check out their jargon buster.

  • What is O2 World Chat?

They are always looking for ways to improve the services they offer, and they have decided to close their O2 World Chat app. You would no longer be able to use the app, and apart from any prohibitions listed below, any balance you had in your account on 1 November will be refunded to the card you originally used to top up. If you used multiple cards to top up, valid account balances will be refunded across the cards. Refunds will take up to 30 days to complete.

The following exclusions apply to credit balance refunds:

  • If you’ve never topped up but have an account balance from a promotional offer, the balance will expire on 31 October. You are not eligible for a refund.
  • In accordance with the O2 World Chat terms, if you haven’t made a call or topped up since 30 April 2018, your account will be deemed inactive and the Credit you have on your account will be lost and will not be refunded.


  • How to set up a personal hotspot in O2?

To use your phone as a personal hotspot, you will require a 3G or 4G connection.

PAY MONTHLY CUSTOMERS; if you have an iPhone or Android, switch the Personal Hotspot on to get started.

If you’re a PAY AS YOU GO CUSTOMER, you can now tether up to five devices on your iPhone if you have an iPhone 5 or newer.

  • iOS 10.1 or newer – to update your iOS software, go to Settings, then tap General, a Software update to check if an update is available
  • Your carrier setting as version O2 26.1 – to update your carrier settings, you need to go to Settings, then tap General, About and, if available, a pop up should appear to change the carrier setting.
  • On Windows Phone, you need to go to Settings, then tap Internet sharing, Share over, and Wifi. Then make sure Sharing is set to On.

Once you’ve done this, you can connect to the hotspot the same way you’d link to any WIFI network. You can also pair devices over Bluetooth, or use a USB cable. You can set a password for your hotspot to stop other people from connecting to it. Just make sure you give the password to the people you want to share your data with.


  • How O2 sharer plans work?

Sharer plans are Pay Monthly tariffs that allow the data allowance from one device to be shared with another. For example, if you have two O2 Pay Monthly mobiles in your family and one is on an O2 Refresh tariff with a data allowance of 1GB or more the data can be shared with the second phone. You need to switch it to a sharer plan tariff once it’s out of contract.

Moreover, your lead device can share its data allowance with up to nine others devices, either mobiles, tablets or SIMs. Extra devices can be added to your sharer plan at any time. And you can have more than one lead device too.

All mobiles or tablets using a shared data allowance need to be on one of our Monthly Pay contracts – sharer plans are not available for Pay As You Go or Business devices.

You can track how much of your data allowance each device is using in My O2.

Sharer plan devices can only be bought in an O2 store or by dialling 0330 8800 908.

If you already have two or more devices on O2, log into My O2 to see if you can switch to a sharer plan.

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