Just joined O2

[Mischa]

I am just waiting for my SIM card arriving tomorrow . I have a pac code to keep my number but it looks as if oi have a new number which I don’t want . Please help. 

[jonsie · Accepted solution]

Fill in the form here

Guide: Migration & porting into O2  

[pgn]

There are a couple of different forms in that guide from @jonsie - the one in the last section is what you're after,@Mischa: 

https://www.o2.co.uk/apps/help/help/migrateinformhome

Good luck!