Apple’s Activation Lock feature, introduced three years ago with iOS 7, is a great security feature that’s been credited with a decline in theft rates. Like any good security system, however, it can be a bit of a double-edged sword; Apple has made Activation Lock so secure that it can be a problem for users who are trying to purchase a used iPhone (or other iOS device) legitimately — if the original owner of the device forgets to turn…
