Face or fingerprint login uses your face or faceprint as a way of confirming your identity and securely accessing your devices.

Setting up Faceprint Recognition On an Android Device:

1. From Settings, swipe to and tap Security and privacy, and then tap Biometrics.
2. Tap Face recognition, and then enter your PIN or password. If you do not already have a secure screen lock, you will need to set one up.
3. Tap Continue, and then hold the phone 8-20 inches away as you position your face inside the circle. Hold the position until the progress bar reaches 100%. If you wear glasses you may be prompted to remove them to finish the process. 
4. When you're done, adjust your desired settings.

Setting up Fingerprint Recognition On an Android Device:

1. Navigate to Settings, then tap Security and privacy, and then tap Biometrics. Tap Fingerprints.
2. Enter your lock screen credentials. If you do not have a screen lock set up, you may be prompted to create one at this point. When you're ready, read the information and then tap Continue.
3. Use the on-screen prompts to register your fingerprint. When registering your fingerprint, make sure to fully cover the fingerprint sensor with your finger to prevent strong light from entering the fingerprint sensor. When you're finished, tap Done.
4. Next, make sure that the switch next to the Fingerprint unlock is turned on. 
5. To unlock your device using your finger, tap the screen or press the Power key or Side key. Then, place the registered finger on the fingerprint scanner, wherever it's located. The device will automatically unlock if it recognizes your fingerprint.

Setting up Faceprint Recognition (Face ID) On an iOS Handheld Device:

1. Go to Settings, then tap Face ID & Passcode. If asked, enter your passcode. If you didn’t set a passcode, you’ll be asked to create one to use as an alternative way to verify your identity.
2. Tap Set Up Face ID.
3. Hold your device in portrait orientation, position your face in front of your device, then tap Get Started.
4. Position your face inside the frame and gently move your head to complete the circle. If you're unable to move your head, tap Accessibility Options.
5. When you finish the first Face ID scan, tap Continue.
6. Gently move your head to complete the circle for a second time.
7. Tap Done.

Setting up Fingerprint Recognition (Touch ID) On an iOS Handheld Device:

1. Make sure that the Touch ID sensor and your finger are clean and dry.
2. Tap Settings > Touch ID & Passcode, then enter your passcode.
3. Tap Add a Fingerprint and hold your device as you normally would when touching the Touch ID sensor.
4. Touch the Touch ID sensor with your finger—but don't press—so the device can begin recognizing your fingerprint. Hold your finger there until you feel a quick vibration, or until you're asked to lift your finger.
5. The initial setup screen for Touch ID
6. Continue to lift and rest your finger slowly, making small adjustments to the position of your finger each time.
7. The next screen asks you to adjust your grip. Hold your device as you normally would when unlocking it, and touch the Touch ID sensor with the outer areas of your fingertip, instead of the center portion that you scanned first.

Setting up Fingerprint Recognition (Touch ID) On Mac:

1. On your Mac, choose Apple menu  > System Settings, then click Touch ID & Password in the sidebar. (You may need to scroll down.)
2. Click Add Fingerprint, enter your password, then follow the onscreen instructions.
3. If your Mac or Magic Keyboard has Touch ID, the sensor is located at the top right of your keyboard. You can add up to three fingerprints to your user account (you can save up to five fingerprints on your Mac).
4. A keyboard that has Touch ID, with the fingerprint sensor identified in the top right corner.
5. Choose how you want to use Touch ID:
6. Unlock your Mac: Use Touch ID to unlock this Mac when you wake it from sleep.
7. Apple Pay: Use Touch ID to complete purchases you make on this Mac using Apple Pay.
8. iTunes Store, App Store, and Apple Books: Use Touch ID to complete purchases you make on this Mac from the Apple online stores.
9. Autofill passwords: Use Touch ID to automatically fill in user names and passwords and to automatically fill in credit card information when requested while using Safari and other apps.
10. Fast user switching: Use Touch ID to switch between user accounts on this Mac.

Setting up Face or Fingerprint Recognition (Windows Hello) On Windows:

1. Select Start  > Settings  > Accounts  > Sign-in options.
2. Under Ways to sign in, you'll see three choices to sign in with Windows Hello:
   • Select Facial recognition (Windows Hello) to set up facial recognition sign-in with your PC's infrared camera or an external infrared camera.
   • Select Fingerprint recognition (Windows Hello) to set up sign-in with a fingerprint reader.