To restore the factory settings of Samsung S4 mobile phone, please follow the following steps:
Operation method: Click: Settings-Reset-Restore Factory Settings-Reset Equipment in the main menu.
1. Under the main menu bar, click Select Settings.
2. Enter the setting menu, and click to select the reset option.
3. Enter the reset options menu, and click the option to restore the factory settings.
4. Enter the factory reset option, click the reset device option, and the phone will reset and restart.
Tip: If the phone has a screen lock password, you may need to enter the screen lock password when you return to the factory.