>>> Go to Application Drawer.
>>> Select Apps tab > Settings > Backup & Reset.
>>> Tap Factory data reset > Reset phone > Erase everything to reset phone.
>>> Turn OFF your phone.
>>> Press and hold together Volume Up + Power button.
>>> After 10 seconds you see Red screen, release Volume up key.
>>> You can now see recovery options.
>>> Select wipe data with factory reset and press power key for 2 sec.
>>> Select yes -- delete all user data and press power key for 2 second.
>>> Reboot device.
The instruction provided is the general steps on how to Hard Reset and Factory Reset.If the instruction will not work, please make a comment and we will immediately find the correct procedure. Thanks.