A Hard Reset reverts a phone to its original settings and a clean OS (Operating System) removing all data and information added to the cell phone by the mobile phone user.
In essence a Hard Reset erases everything from the phone and puts the phone back to like new condition as though it’s brand new right out of the box.
1. First thing to do is to power off your phone. Press Power Button to turn it off.
2. Then press and hold together Volume Down + Power button.
3. Next when the led of the bottom of the phone lights on, touch and hold the Menu key.
4. Now if you feel that phone vibrates, then release Power button.
5. Now when you see LG logo, release the keys before the logo disapears.
6. And that's it. Your phone will now restart.