There have also been worries about how much to trust Face ID. The company's first public demo of Face ID didn't go that smoothly, after all — at one point, the demonstrator had to skip the face scan and enter his password instead. The most telling answers on Face ID come from a white paper the company's posted on its security. There are also several instances when Face ID won't work. And by activating the Emergency SOS, you'll also be dialing an emergency number and disabling the Touch ID and Face ID features.

Source: Washington Post September 27, 2017 17:20 UTC