With the phone turned on, go to "Settings". Then, select "Change PC settings". Click on "Update and recovery". Next,...
First of all, turn on the phone. Then, open "Settings". After that, find "Restore Factory Settings". Choose "Settings...
Make sure the device is turned on. Go to "Settings". In Settings choose "Backup&Reset". Then select...
From the Home Screen, open "Settings". In Settings select "Phone" and "Phone management". After that, choose "Factory...
The device must be turned on. Using the Dialer or keyboard, enter the proposed code: *#7370#. Then enter your password or the default one: 12345. That's...
Using the Dialer or keypad, enter one of the suggested codes: *#7370# or *#7780#. Well done! Wait a while for the operation to complete.