That’s the thing, it learns ur face as time goes on. I think it said every so often when you unlock it, it compare’s to what it has on file and adds the new face data to the face print. So it will add ur growing facial hair each week.I'm sure they tested facial hair but I wonder how much facial hair lol.. I plan to set it up clean shaven and then not shave for the month of November. Let us see!
you would have a pass code like you do now on your current devices but yeah you wouldn't be able to open each others phones using face IDcurrently I and my wife have each other's finger print on our iPhone's so we can open each other's phone to access photos etc. What happens now when both of us receive our X's? Is there an alternative like a pass code for each of us to open the other's iPhone X?