The latest iPhones (except for iPhone SE) use Face
ID to unlock your device.
Previously on iOS 11, the tech could only
recognize a single face, so anyone else who uses your phone would have
to input a passcode to unlock your iPhone.
Just as you could register
multiple fingerprints with Touch ID for past iPhones, Apple now lets you
register multiple faces to unlock a single device.
Here’s how to do it!
Step-2. Tap Face ID & Passcode.
Step-3. Type in your passcode.
Step-4. Tap Set Up an Alternate Appearance.
Step-5. Scan your face and follow the prompts.