Performing factory data reset ( master reset or hard reset ) Samsung Galaxy Ace Duos I589 via Settings menu:
Ø select Apps from home screen
Ø select Settings
Ø select Privacy
Ø select Factory data reset
Ø select Reset phone
Ø select Erase everything.
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 your phone hangs or does not responding, Press and hold power key about 10 seconds. It will rebooting automatically. Or remove and re insert the battery and SIM Card.
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