pay as you go TO pay monthly, can I upgrade and just keep the sim `i have already

[PAW1]

Hi

I have pay as you go and want to change to pay monthly. 

 Instead of getting sent a new sim and going through the PAC code thing can I just keep the sim I have already.

if so how do I go about it?

thanks

Paul

[MI5 · Accepted solution]

@PAW1 

You need a new sim as they are different.

See guide for the simple process change Guide: Migration & porting into O2  

Switching from O2 Pay As You Go to Pay Monthly

If you switch from Pay As You Go to a Pay Monthly tariff, we will send you a new sim with a new phone number.

If you want to keep your original number, we can arrange this. You’ll need your new Pay Monthly phone number from your O2 confirmation email or sim pack.

• You can fill in our online form: Switch your number to Pay Monthly.
• Or call us on 202, free from your O2 phone, on 0344 809 0202 from any other phone, or visit an O2 store.

https://www.o2.co.uk/help/device-and-sim-support/how-to-keep-your-mobile-number