1, there is something wrong with the home key and related components, and the fingerprint cannot be scanned correctly;
2, the fingers are sweaty or powdery, or the fingers are greasy. Resulting in errors in scanning fingerprints;
3. Finger injuries leave scars;
4. The unlocked finger is different from the finger you entered before;
5. Maybe the finger fingerprints are too shallow. Under normal circumstances, fingerprints can't be changed by others, because once set, it is a double guarantee. Before setting the fingerprint to unlock, the system will ask you to set the digital password first. If your fingerprint can't be unlocked suddenly that day, you can try the following methods: 1 Shut down and restart, let the system re-identify the fingerprint, and let the phone unlock after the garbage is automatically removed; Don't forget that you have an alphanumeric password. This can also be unlocked. Just re-enter the fingerprint after unlocking. 3. You can also press and hold the mute button and the power button of the volume button at the same time until the screen lights up, and then follow the prompts to brush the machine. If the above three methods fail, take it directly to the repair shop for professional inspection, clean up the hard disk of the mobile phone and restore the factory settings.