Switching my mobile number

[MarkHemingway]

Hi we have just switched to O2 on a pay monthly SIM from Vodafone and would like to keep the same number. We have just received the PAC code from them - how do we give this to you so that you can swap the number?

[jonsie]

All explained here

https://www.o2.co.uk/help/phones-sims-and-devices/how-to-keep-your-mobile-number