I have a refurbed iphone 8 delivered today from giffgaff which will not accept any of the three giffgaff sim cards I have. I get 'SIM Not supported' message each time. Despite assurance it seems that phoneis still locked to another network. Need to transfer to new phone urgently before I go abroad.No response from Giffgaff yet. Any suggestions?
Try this i don't know if it will work
Insert giffgaff SIM
Do not turn phone on
Connect phone to computer with USB cable
iPhone will switch on. Wait until itunes registers it and checks for updates
Install the carrier profile update if offered
Disconnect and restart phone