WAYS TO HARD RESET A PHONE
SAMSUNG, SONY, LG, HTC, ETC
Turn off you phone than Press the Volume Up (or Volume Down) button & Power button
to get this feature
Then choose Factory Reset
To boot into Android System Recovery, hold down the home button and the Power at the same time.
Now go over to the
“Erase Data/Factory Reset”
Confirm that you want to wipe all the data and wait for completing
Than Select Reset your system to the Hard Reset setting and restart the Reboot system.
For More Details About Factory Reset