This iOS 11 trick lets you quickly disable Touch ID

Apple's upcoming iOS 11 has a feature that lets you quickly disable the iPhone's Touch ID fingerprint scanner, forcing you to use a passphrase to get into the phone. 

The feature, spotted on Twitter and reported on by The Verge, is actually a way to quickly call an emergency number, and is accessed by rapidly clicking the home button five times. But after you've done that, the only way to access your phone again is by typing in your passphrase (assuming you've set one). 

There were ways to disable Touch ID before; for example, rebooting the phone or scanning the wrong finger a few times will do the trick as well. But this is arguably the fastest way to disable Touch ID, which is important as officers of the law can force you to give up your fingerprint, but (ideally) cannot force you to give up your password.  Read more...