Face ID was introduced with iOS 11 as a way to unlock an iPhone X and authenticate purchases and logins. With iOS 12, Face ID has been enhanced and enhanced. You can now add an alternate look, either for yourself or for another person. It's a handy trick if you wear glasses, or if someone near you needs regular access to your iPhone XS . Now you and your significant other sign in to the same device with your own face ID. Let's check this out.