Hard Reset SAMSUNG I9150 Galaxy Mega 5.8

Hardreset with software menu:

1. Power on your phone.
   
2. Check your battery is no empty.
3. Go to menu: Setting > Backup & Reset > Factory Data Reset > Reset Device.
4. Next select Delete All.
5. Now will do the process to Master Reset to Factory Default.

Hardreset with Hardware key button:

1. Check the battery is full.
2. Turn off your device.
   
3. Then press and hold together: Power Button + Volume Up + Home Button .
   
4. If the button at number 3 not work, you can try with press and hold together Power Button + Volume Up Button.
5. Now you should see the menu recovery, and select "Wipe Data/Factory Reset" with Volume Button to select and use Power Button to ok or enter.
   
6. Next choose "Yes -- delete all user data".
   
7. After that accept operation "reboot".
   

Hardreset with Secret Key Code Security:

1. Power on your phone.
   
2. Make sure that your battery is no empty.
3. Dial or press number to call: *2767*3855#.
4. That number code will force format your device.

WARNING !
Hard Reset will erase all of your data
All described operations you are doing at your own risk.