Hard Reset LG MG800

Start-up device by pressing Power button.
Then go to Main menu select the Reset Settings.
Next on Master Reset and confirm it wholpe operation by pressing left Softkey.
Enter the Security Code to confirm it (Default code is 0000).
Done, after restart device is ready to work on.

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