Samsung Galaxy S9 / S9+ - Set Up Fingerprint Recognition
A fingerprint is utilized to unlock the device.
For the fingerprint scanner to operate, hands must be clean and free of moisture, dirt, oil, lotion, dyes, etc.
Up to 4 fingerprints can be registered on the device.
From a Home screen, swipe up or down from the center of the display to access the apps screen.
These instructions only apply to Standard mode and the default Home screen layout.
Navigate: Settings > Biometrics and security.
From the Biometrics section, tap Fingerprint Scanner.
If presented, enter the current PIN, password, or pattern.
If presented, tap Continue and select a lock screen option (e.g., Pattern, PIN, Password) then follow the steps to complete the process.
If necessary, refer to Set Up Screen Lock for assistance.
To register your fingerprint, swipe your fingertip down over the sensor (back of the device; below the camera) to scan.
View the on-screen tutorial for assistance.
Repeat this step as necessary until the process is complete.
Tap Done (lower-right).
From the 'Try it out' screen, touch the fingerprint sensor to unlock.
Tap the Fingerprint unlock switch to turn on or off .