Replacement sim card

[Floss1]

I have had a new device and need a nano sim as my SIM card is to big to fit it

[Bambino · Accepted solution]

@Floss1 If you call customer service they will send you a new sim which you can swap with your old one:

SIM Swap: a mini guide (incl eSim) - O2 Community

Call 202 from your mobile or 0344 809 0202, 0800 902 0217 or 0800 032 1402 
When it comes to the reason you are calling, stay silent for 15 seconds and you will be taken to the keypad options.
Press 2 for Everything Else
Press 5 for More Options
Press 7 for Anything Else which will put you though to someone.
Say 'Upgrade', 'Lost/Stolen', or 'Fraud' if the suggestion above doesn't get you through.
Best time to call is 8 am.
You can also reach O2 via social media:
Facebook (https://o2uk.co/O2CFB), Twitter (https://o2uk.co/O2CTW), or Instagram (https://o2uk.co/O2CIG)

Alternatively you can call into an O2 store if you have one nearby and they'll do it for you. Be sure to bring photo ID if you choose to do that.

[MI5]

@Floss1 

Check if you can push the middle out of your old sim.

If not, Call into an O2 store, if you have one nearby, and they will supply you with a new sim and activate it for you. Be sure to bring identification with you.
Alternatively, speak to customer service. 
Call 0344 809 0202, 0800 902 0217 or 0800 032 1402
When it comes to the reason you are calling, stay silent for 15 seconds and you will be taken to the keypad options.
Press 2 for Everything Else
Press 5 for More Options
Press 7 for Anything Else which will put you though to someone.
Say 'Upgrade', 'Lost/Stolen', or 'Fraud' if the suggestion above doesn't get you through.
Best time to call is 8 am.
You can also reach O2 via social media:
Facebook (https://o2uk.co/O2CFB), Twitter (https://o2uk.co/O2CTW), or Instagram (https://o2uk.co/O2CIG)