Face ID can recognize more than one face in iOS 12

The gist of it is that Face ID can now recognize a second face... or a mask, if for some reason you want to use a mask to unlock your iPhone.
Jokes aside, this feature is likely intended to be used for parental control in a future iPad with Face ID support, though it's made its way to the iPhone X as well.
One of the current downsides of multi-user support is that you can't reset just one of the faces you've enrolled into the system, 9to5Mac reports. Instead, if you want to add a new face, you'll be forced to clear out both faces and them anew.
source: 9to5Mac
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