Note: Restore factory settings All the data will be lost, but not the system factory has some applications, only the user's own installation or write data, such as games, software, text messages, contacts, photos and so on.
1 on the mobile phone desktop click "All settings" option, after entering the setup interface after the "about the phone" and then click on it to open into the "Backup and reset" effect as shown in the following image
2 after we just click "Restore factory Settings", according to the need to check whether to clear the "application" and "built-in storage" and so on. Click "Reset Phone". (pictured below)
Note: If the data on your phone is too much to restore the factory set time will be longer or make you feel no response, at this time there is a solution is to remove some of the mobile phone applications, and then to restore the factory settings will be faster.