1) Check you’re eligible to switch from BT Mobile
If you’re out of contract you can switch from BT Mobile when you like and it won’t cost you anything to leave.
If you’re not sure if you’re still under contract, you can find out in a number of ways.
One option is to contact BT Mobile customer support on 150 from your mobile phone. Or by calling 0800 800 150 from any other phone (standard network rates apply).
Opening hours are 8am-8pm Monday-Friday and 9am-6pm Saturday and Sunday.
Alternatively, you can find your contract end date by opening the BT Mobile app on your phone. Or by logging in to your BT Mobile account.
2) Contact BT Mobile to tell them you want to leave and get a PAC Code
Now’s the time to contact BT Mobile to tell them you’d like to leave. You'll find contact numbers and opening hours for customer support in step 1.
While you’re on the phone to customer support, ask them for your PAC Code too. This is a short sequence of numbers and letters that’s vitally important for transferring your current phone number to the network you’re joining.
It’s a legal requirement that networks provide you with your PAC Code within two hours of your request. When you’ve got it, it’s clever to make a note of it. Just in case.
What’s most important to note, though, is that PAC Codes expire after 30 days. So if you haven’t used yours within this timeframe, you’ll need to get in touch with BT Mobile again to request a new one.
3) Find and buy a new deal from O2
Your next task is to choose and sign up for a new deal contract from O2. Once you’ve passed O2's credit checks, you’ll receive your phone or SIM card in the post.
4) Contact O2 to give them your PAC code
Now you’ll just to ring O2 to give them your PAC. You can get in touch with O2's customer support team on 034 4809 0202 from a landline (standard network rates apply).
5) Insert your new SIM card from O2
If you got a new phone, use your pin-key to unlock the handset's SIM tray. Then insert your O2 SIM.
If you went for a SIM-only deal, you can just put the O2 SIM in your existing phone.
While your number is being transferred, you'll be supplied with a temporary number to use. So you can still make and take calls and do whatever you'd normally do on your phone.
6) Wait for your number to be transferred from O2
The transfer should be complete the next working day. But this varies depending on the network you're joining.
The transfer could also take a little bit longer if a weekend or Bank Holiday gets in the way.