Keep my old o2 number with my new o2 sim only contract

[Coos72]

I have got a new sim only deal from a third party for o2,I have the new sim and I would like to keep my current number which is also on a pay monthly o2 deal which has now come to the end of the contract

[madasaf1sh · Accepted solution]

@Coos72 

Follow this guide here, but be prepared for fun and games Guide: Migration & porting into O2