Enable Face ID to unlock your phone, authorize purchases, and sign in to apps with just a glance.
Enter your passcode when prompted. If you haven't set a passcode yet, you'll be asked to create one first.
Hold your iPhone 10-20 inches from your face. Slowly rotate your head in a circle so the camera captures all angles. You'll do this twice.
Toggle on the features you want — iPhone Unlock, App Store purchases, password autofill, and supported third-party apps.