So you'd use the PIN. Then they get the metaphorical middle finger without seeing you use the real one.
Besides, no criminal cares about your phone being unlocked. They just want the phone. Well, I guess there are circumstances where a criminal wants information, but if they're the ones compelling you, you have other pressing issues that go beyond protecting information from unauthorized parties.
I'm talking about being compelled to unlock your phone by someone seeking information on it, either depriving you of due process or your civil liberties.
A criminal who is motivated to steal your phone under threat if violence is motivated to have you unlock the phone and disable 'Find my Phone' or whatever the Android equivalent is. It considerably increases the resale value since the phone can then be wiped and used by a new Apple ID.
Besides, no criminal cares about your phone being unlocked. They just want the phone. Well, I guess there are circumstances where a criminal wants information, but if they're the ones compelling you, you have other pressing issues that go beyond protecting information from unauthorized parties.
I'm talking about being compelled to unlock your phone by someone seeking information on it, either depriving you of due process or your civil liberties.