Apple has added some security features to iOS 11. One is 5 quick taps on the home button locks the device and disables the fingerprint reader, law enforcement can make you touch the finger print reader but they have to get a court order to make you give up a pass word, a weird 9th circuit thing. The other is really sneaky. The goons at the Airport succeed in getting your iPhone open. They take it to a back room and plug it in to download files. As soon as they plug it in the iPhone locks up and requires your access code to open it again. You tell them it is "GO POUND SAND".