How to perform double clearing operation on Meizu mobile phone?

There are two ways to restore the factory settings of mobile phones, namely, double clearing:

1, in the setting-> About mobile phones-> Storage->; Clear mobile phone data-> Erase user data, applications and format storage disks. If both are checked, the factory settings of the mobile phone will be restored;

2. In the power-off state, press and hold the power button+volume plus key to enter the system upgrade interface at the same time, and then press the volume plus key and the volume minus key five times continuously to select to clear the data.

This operation will erase all data in the phone, including contacts, information, installed software, etc. , and all the data stored in it (such as videos, photos, etc. ), so pay attention to backup in advance.