Google had face unlock back in 2011 when the Galaxy Nexus came out but I'm not going to pretend it was anything like this. It worked alright but had plenty of warnings saying it wasn't perfect and that someone that looked like you could unlock your phone. I always found it quite cumbersome to use because it turns out my natural way of holding my phone doesn't point the front camera directly at my face. I hope for the sake of iPhone X users that that isn't true for FaceID and that the sensors are wide angle enough that it isn't as annoying to use as Face Unlock is.