Using your PAC code
Once you’ve got your PAC code head to bt.com/keepmynumber and log in using your BT ID and password. If you haven’t set one up, it’s very easy to do so.
Create a BT ID now >
Follow the on-screen instructions to enter your PAC code.
Once we’ve got your PAC code, we’ll get in touch with your old network provider and tell them you want to switch.
You’ve got 30 days to transfer your number from the day you get your PAC code, otherwise you’ll have to request a new one.