How to keep number of my old O2 Pay As You Go to another O2 Pay As You Go sims

[Alannnnnnn]

I have several O2 Pay As You Go SIM cards, and I want to transfer my number from one to another. However, when I try to use the PAC code via O2’s online form, it shows the error 'This can't be an O2 Pay Monthly PAC.' How can I transfer my number between two O2 Pay As You Go SIMs?

[Enlli · Accepted solution]

Internal numbers don't need a PAC. You need to follow the MIGRATION process

Guide: Migration & porting into O2 

[Oxonian]

I am bemused as to why you want to do this @Alannnnnnn ? 

If you have two PAYG SIMs with O2, why don't you just keep the one carrying the 'phone number that you want to retain ?

It seems, on the face of it, a pointless exercise to move the number to another SIM first. 👍  

[MI5]

I suspect one has a more favourable, no longer available, tariff, not that it is any of our business.