This can be tricky. It depends a lot on your phone. Have a look at our unlocking guide Unlockapedia for info on your specific phone. Phones locked to O2 work on our network without needing to be unlocked.
Any phone you buy from us should be already unlocked.
How to unlock your mobile phone on any network, Uswitch guide
Here are other ways you can get your phone unlocked:
If you've recently joined giffgaff, contact your previous network provider for a Network Unlock Code. (If you don't know the previous network, check if there’s a logo from another network printed on the phone)
Contact the manufacturer
Contact the seller
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