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Injured
If a registered fingerprint isn't working as expected, remove and re-add the fingerprint. If your finger is
injured, add fingerprints for your other fingers and use them until healed.
Issue: Fingerprint option disappeared from Security & privacy menu.
After each troubleshooting step, check to see if your issue is fixed.
1. Turn your phone off and then on again.
2. Check if a software update is available for your phone.
3. Check for app updates.
Open the Play Store app, then touch your profile icon > Manage apps & device.
4. Use safe mode to see if apps you installed are causing the issue and uninstall as needed.
If the sensor works correctly in safe mode, a 3rd party app is probably causing the issue. These apps can
cause issues: lock screen apps, app locks that use the fingerprint sensor, RAM boosters, and RAM
cleaners.
5. Reset the phone.
Settings : Security & privacy : Lock and unlock phone 198