Face ID on the iPhone X lets you unlock your smartphone with your face, but it’s limited to just one person. That changes in iOS 12. Now you can add a second face so someone else can unlock your iPhone, too. Here’s how to set it up.
Face ID is a feature introduced in iOS 11 on the iPhone X that scans your face instead of your fingerprint, like Touch ID, to unlock your phone and authenticate purchases. Touch ID supports multiple fingerprints, but prior to iOS 12 Face ID supports just a single face.
iOS 12 lets you add a second face to Face ID, but hides the feature under what Apple calls “Alternate Appearance.”
To add a second person to Face ID in iOS 12 do this:
It’s likely that Alternative Appearance is designed for people who have difficulty with Face ID because of more significant changes in appearance due to changing wardrobes like glasses or hats — but it has the happy coincidence of supporting a second person as well.
Here’s the caveat: You can’t remove just one face from Face ID. If you decide the person you added to your iPhone shouldn’t have Face ID access any more you’ll have to reset Face ID completely and start over.