Why do I need a sim card in the first place to unlock an iphone? Does it then lock onto the new carrier?
ATT is telling me I need to swap out the sim card with a new one to complete the unlocking process, but why? Why cant I complete the unlocking process without a sim card? If I unlock the iphone with a sim card in it (lets say straight talk), then will the iphone be locked with straight talks network and no one else; in otherwords not really an unlocked iphone?
iPhone 4S