I have an iphone 5, for AT&T and it says my sim card is invaild but it is an activated sim card from at&t? how can i bypass that and just get into the phone to use it.
I cant find out my operating system because it's locking me out of my iphone 5 and i cant get into the phone, period and i just want to be able to use the iphone.
iPhone 5, I cant find out what the operating