How to restore the fingerprint unlocking function of American mobile phones?

1. Let the phone enter the brush mode first. There are two ways to enter the brush mode, one is to boot into the system! But we forgot the password lock of the mobile phone! So this method doesn't work, that's the second method! That is, when the machine is turned off, press and hold the "On"+"Volume+"keys for about 3 seconds to release, and then you can enter the interface of restoring the brush mode.

2. When entering the interface of brush mode, select Simplified Chinese mode (use the volume button to select up and down, use the power button to confirm, and there is a prompt at the bottom of the interface).

3. Enter Chinese mode, press the volume button to move to the second item "Clear data", and press the power button to confirm. Enter the data cleaning interface.

4. In the data clearing interface, press the volume reduction key to move to the option of "clearing user data", and press the power key to confirm. You will be prompted whether you are sure to clear the user data. This operation cannot be restored to the cloud. Select confirm. Next, the user data will be cleared in a few seconds. At this time, we will return to the main menu interface, and we can restart the phone.

This can only be restored to the factory settings or the upgraded system. If it doesn't work, you can only get it back by refreshing the system. If the factory settings are restored or refreshed, the data of the mobile phone will be emptied, and important things should be backed up in advance.