Is my phone locked to another network?
If your phone isn’t working with a giffgaff SIM it may be locked to another network. It will usually say something like, “SIM card not valid”, “SIM lock”, or “Insert correct SIM card”.
- Check if there’s a logo from another network printed on the phone
- Some phones may display a message like, “SIM not accepted” when they’ve been blacklisted as lost or stolen
- Check out Unlockapedia for info on how to unlock your phone