Transferring number to PAYG?

lovelldr

Hi guys.

I was looking to get a new mobile phone, and have been told that I can't use my pac code to get the phone, otherwise I wouldn't be able to claim my cashback...

So I was just wondering, would it be possible to get a new payg sim (from O2 or somewhere which are free) and then use my pac code on that new sim to be able to check that I've not forgot to give someone my new phone number.

I wouldn't really be wanting to pay anything onto this new sim, I'd just want it to ensure I can receive messages/calls.

So, is this possible? Or would the new payg sim cancel the account without me putting credit on?

Thanks a lot for advice guys