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. The very first step here is turning ON your device.
2. Now when its turned ON, you should go to dialing or standby screen.
3. Type this code in phone's Dialer: 2945#*#
4. Now confirm with your Call button.
5. Your device will restart and soon will be ready to use.