Performing factory data reset ( master reset or hard reset ) Samsung Galaxy Grand Quattro via Settings menu:
- Select Apps from Home screen
- tap Settings
- tap Backup and reset
- tap Factory data reset
- tap Reset device
- tap Erase everything.
To avoid permanent damage to your device, do not restart your device while a reset procedure is underway.
Warning! All data will be erased from device memory, including system and application data, settings and downloaded applications. Back up your important data. The device will restore to factory settings.
If you can not perform a hard reset via Settings menu, other way hard reset using Hardware keys. You need using hardware keys if you forgot your pattern, you haven’t created a Google account on the phone and you forgot your PIN, Password, and the backup PIN, you need to perform a hard reset.
Performing Soft Reset
If your phone or tab hangs or does not responding, try to Press and hold power key about 10 seconds. It will rebooting automatically. Or try to remove and re insert the battery and SIM Card ( If available ).