I recently bought an iPhone 5S in a Carphone Warehouse branch. I was advised that the phone would lock itself to the network of the first SIM card that was used in the phone.
As I am a Giffgaff user, my new Iphone locked itself to Giffgaff.
But I travel abroad quite often and I would like to unlock it so I can use other SIMs.
I can only find info on how to unlock a non-Giffgaff phone, but not the other way round.
Any help to get my iPhone 5S unlocked highly appreciated.