Keep old number

[Chipwanderlust3]

I saw an O2 SIM deal on U-switch and got the SIM deal. This deal wasn't on my O2 account as an option so I basically got a new sim contract. I'm already with O2 so filled a keep my old number form. But now in my tariffs it shows both numbers. I only wanted the new cheaper tariff with my old number. Can someone kindly help me to figure this out please. Thank you! 😊 

[Enlli · Accepted solution]

Check out the guide to migrating your number across. Usually the keep your number form is for joining from another network 

Guide: Migration & porting into O2