Cancelling old contract

[Abi]

I have just bought a new contract with o2 but i want to keep my old number which was with o2 how do i go ahead with cancelling the old contract as this is  airtime only

[MI5]

@Abi 

You need to call customer service and ask them to migrate your number across which will automatically end your old contract.

Guide: How to find help & contact O2 

and good luck getting through !