Before you try the factory reset or hard reset on your device, make sure that you have backup your important files. Restoring the default settings or factory reset your device will delete all your existing files and will go back to its initial state.
>>> Go to Menu.
>>> Select Settings > Backup and Reset.
>>> Tap Factory data reset > Reset device > Erase everything to reset phone.
>>> Turn off your phone.
>>> Press and hold together Volume Down + Power Button for a few seconds.
Also Try Combination Below:
>> Home Button + Volume Up + Power Button
>> Volume Up + Power
>> Volume Up + Volume Down + Power Button
>> Volume Down + Menu Button + Power Button
>>> Select "wipe data/factory reset" by using Volume buttons, and Power button / Volume Up to confirm.
>>> Then choose "Yes -- delete all user data".
>>> Confirm operation "reboot system now".
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.