Touch ID lets users register up to five fingers that can unlock an iPhone, which has long been a boon for those who share access to their iPhone with trusted family members. However, users of the iPhone X havenât been able to give a second person Face ID-based access, forcing those people to wait for Face ID to fail and then tap in a passcode manually. iOS 12 has an option, while not recommended or designed for this, allows a second person to register their face with Face ID on the iPhone X and the new iPhone XR, XS, and XS Max. To set this up, go to Settings > Face ID & Passcode. Enter your passcode and tap Set Up an Alternate Appearance. Then give your iPhone to the person who should have access and have them follow the simple setup directions.
