iPhone 4 jailbreak has been unlocked to prepay sim, can the sim be changed without starting over?
I have an old iPhone 4, originally locked to AT&T, running iOS 7.1.2, modem firmware 04.12.09, jailbroken with Pangu, and unlocked using SAM and a US prepaid sim. I did all this so that I could use this phone in the UK. Now as the phone is unlocked can I just replace the sim with a prepaid sim from a UK carrier, OR do I have to go through the whole unlock process again?
I own the phone, no contract, but AT&T wouldn't unlock it because I just upgraded to a 6S. They said I had to wait 30 days. I need a solution before then.
Any help gratefully accepted...