Sim only and keep old number from another network

[Elissa]

I am currently with another provider and would like to swap to o2 as sim only, but keep my old number. I’ve got a pac already.

[jonsie · Accepted solution]

Follow this guide @Elissa 

Guide: Migration & porting into O2  

[encoderX]

Hi 🙃 Give the PAC when ya sign up for o2 sim only or if already have sim go here:
https://www.o2.co.uk/help/phones-sims-and-devices/how-to-keep-your-mobile-number/online-form