In order to hard reset a Samsung Galaxy Grand I9082, you should perform the following steps.
Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
Samsung Galaxy Grand I9082 device will be brought back to the default configuration of a brand new device.
1. Turn off the phone by holding the Power button.
2. Press'n'hold these three buttons simultaneously: Volume Up, Power, Home. Let go of them when the message saying "SAMSUNG Galaxy Grand GT-I9082" appears on-screen.
4. Now select, in the same way as above, Yes and Reboot system now.
5. Done!