Physical combination key restart
Xiaomi mobile phone can be restarted by long pressing the power button+volume up button.
Three clean-ups to solve system problems
Sanqing is to format the mobile phone, which can solve most system problems, software flash back and other anomalies. Sanqing was also used to update the system before.
Backup data
Before Sanqing, it is best to open the backup software that comes with your mobile phone to make a backup, which is convenient for recovery.
Enter recording mode
The method of entering rec mode in Sanqing: 1, the mobile phone opens the system update software and chooses to enter rec mode; 2. In the power-off state (button the battery yourself, and press and hold the power button 10 second to power off), press and hold the power button and the volume plus button at the same time, then light up the screen and release it later.
Select Clear Data.
After entering rec mode, select Simplified Chinese, clear data, clear cache, clear data again, clear user data again, clear data again, clear all data again, and restart the phone after clearing.