Hey not mine but my friend's iPhone is broken and cannot make calls anymore, it has that warning message on the screen. What I'm wondering is how does apple respond to this, considering that the iPhone is unlocked using a method we found online? If we system restore it the unlock will be gone, correct? Then we can return it to apple? But they'll be like wtf just because we're in Canada instead of the states. Does anybody know what he can do? Thanks in advance!