1. Clean the fingerprint sensor: Use a dry cloth to remove dust, debris, and oil.
2. Make sure your finger is dry and clean: Resist the urge to use lotion or other products on your skin.
3. Register the fingerprint again: Register your fingerprint again as it may have been placed wrong during the initial setup.
4. Check phone settings: Go to your phone’s settings and make sure the fingerprint sensor is enabled.
5. Restart or reset your phone: If problems persist, a restart or reset may help.