&gt; All bets are off if the iPhone is power-cycled. Best bet if you&#x27;re pulled over by authorities or at a security checkpoint is to turn off your iPhone (and have a strong alphanumeric passcode).<p>Excellent advice. Even better, if you&#x27;re about to pass through US customs and border patrol, backup the phone first, wipe, and restore on the other side. Of course, this depends on your level of paranoia. I am paranoid.