1. Under the Standby page, click the "Application" icon.
2. Select "Set".
3. Slide the screen up and choose Reset.
4. Select "Restore Factory setting".
5. Select "Reset Device".
6. Click "Delete All".
7. After the completion of the above operation, the mobile phone will be automatically restarted, the phone has been successfully restored to the factory settings.
Note: If you have previously set up a Samsung account, restore the factory settings will need to enter the password, this password is Apps account password, if you forget the apps password, you can follow the following steps to retrieve:
1. Login to the Samsung Apps website: http://samsungapps.sina.cn/
2. Click on the top right "login".
3. Click "Retrieve your email or password" below the login button on the right side of the page.
4. After you enter the surname, name, birthday, click "Confirm" under "Find e-mail", confirm to be able to display the query to the account name in the page, you choose the Samsung account name that you forgot before you can login again Samsung Apps.
5. If you forget the password, click "Find Password", enter email, after the birthday, click "Confirm". You will then be prompted to "password change email has been sent to your email address", click "Confirm", login to the email you entered, click on the link. When you enter, you will be able to reset the password, enter the password as prompted, and click "Confirm".