yo I was able to replicate this with a iPhone X (inside private retail)\nas soon as lotion was on my face, IPhone refused to work. Rubbing it off it worked right away.he's right, the sensor gets tricked by shine. Very possibly the Iphone will ''learn'' a users face after a few days, just like the function on Galaxy s7/8 where you can retrain the face detection, but at start it fails to register the user. \n\nThere's a high chance that the Iphone demos were set to presenters face, charged up and left for use on stage. Because he didn't walk around with it, use it as his own phone, it essentially didn't know him, and this is why he had to reach for backup. If it doesn't have this function, its definitely possible via OTA update in the future.\n\nLou any thoughts?