Method 2: Hardware Keys
- Turn off your Samsung Galaxy S3.
-
Press and hold down the “Power” button, “Home” button, and the “Volume Up” button.
- Wait for your phone to vibrate, then release only the “Power” button.
- Wait for the Android System Recovery screen to appear, then release the “Home” and “Volume Up” keys.
-
Press the “Volume Down” button until the “Wipe data / factory reset” option is highlighted.
- Press the “Power” key to select the option.
- Press the “Volume Down” button until “Delete all user data” is highlighted.
-
Press the “Power” button once again to select the option. Your phone will then perform the reset process and display “Reboot system now” when complete.
- Press the “Power” key to select the reboot option and complete the master reset.