Open the Settings app
Tap Face ID & Passcode
Enter your passcode
Tap Set Up Face ID
Hold your iPhone in portrait orientation
Position your face inside the frame
Move your head slowly in a circle to complete the first scan
Tap Continue
Repeat the head movement to complete the second scan
Tap Done
Turn on the features you want to use with Face ID
Test Face ID by locking your iPhone and unlocking it with your face