Face ID not working for Apple iPhone XS Max users

An apparent problem with new software means that some iPhone X users are not able to activate Face ID on their handsets. The mysterious bug means that for to unlock their devices they have to enter their pass code manually. Frustrated Apple users are taking to Twitter and Reddit to complain about the problem which causes a'not available' message to show up on the screen. The issue has been linked to the latest iOS 12.1 version upgrade, according to reports from customers on social media. Frustrated Apple users are taking to Twitter and Reddit to complain about the mysterious bug that causes a'not available' message to show up on the screen, pictured Then press and hold the Power button until you see the Apple logo on-screen.