First method: In the first step hold down the Power key for a short while in order to switch off the device. Afterwards press and hold simultaneously the Volume Up + Power button for a few seconds. You should release held keys as soon as the menu with two options appears on the screen. Then hold down the Volume Up key in order to choose Recovery Mode. When an Android Image displays on the screen press the Power button for a short while. In order to choose "wipe data/factory reset" use the Volume Down to navigate and the Power button to confirm. Next, select "Yes--delete all user data". Use Volume Down button to scroll and Power key to select. To restart the phone, select "reboot system now". Success! Your phone should begin the hard reset operation. Second method: First of all, make sure that your device is on. Then from the home screen open Menu and choose Settings.After that select Backup&Reset and tap Factory data reset. Choose Reset phone and select Erase everything to begin hard reset operation. Well done! Your cell phone is ready to use. WARNING ! Hard Reset will erase all of your data , All described operations you are doing at your own risk.