
Please be aware they can only activate SIMs that have been ordered off your account for security reasons. If you don’t have an active SIM to do either of the above, you’ll need to call customer services to activate it. Nothing that is stored on your SIM will transfer across. When you do the SIM swap only your tariff or credit will transfer along with your phone number. Keep turning your phone on and off until the new SIM card is active. The process could take up to 24 hours to complete. If you do it in store you are more likely to be up and running with your new SIM card before you even leave the shop.

You will know when is done because your old SIM will not work but your new one will be up and running. Please note: You'll need to bring ID to complete the process in-store. You can visit your local O2 shop & they will do it for you. Once this has been confirmed you can enter your new SIM info and this will be swapped within 24hrs.
SWAP REFERENCE MINER VERIFICATION
You’ll need to re-enter your My O2 username and password, you’ll then be sent a verification code via text to your phone. You’ll find an option of ‘Swap your SIM’ under ‘Manage your account’. SIM swaps can now also be actioned via your My O2 app. Note that if you're texting 'Swap' to 20220 to activate the SIM this needs to be sent from the old SIM only, the new SIM won’t be active to enable this. You will get step by step instructions via text message. Text the word SWAP to 20220 from your O2 phone. Note also that if you're changing phones/upgrading, sometimes there is no need to do a SIM swap if your old SIM fits the new phone. You can set up your new SIM card to have 4G at Note that there is no number attached to a replacement Pay Monthly SIM card, it is blank. This is to have an updated network such as 4G available when it's rolled out in your area. You'll need to perform a SIM swap most times if you're upgrading to a new tariff. A recommendation is to do it carefully as breaking out the Nano when a Mirco SIM is needed will require a whole new SIM to be sent. It is detailed on the card what area you need to break out for what size.

You just need to break out what size you require. A SIM card is sent with 3 size options so you can pick the correct size to fit your device:

If it's your first contract with O2 then you will be provided with a new SIM card and number with your shiny new phone. This is just a quick help guide for people who want advice on doing a SIM swap.
