1 In order to switch off the device hold down the Power key for a short while.
2 Afterwards press and hold Volume up + Power button at the same time for a couple of seconds
3 You should release held keys when the Recovery Mode appears on the screen.
4 Press Volume Down to choose "wipe data/factory reset", and then push the Power button to confirm.
5 Select "Yes--delete all user data". Use Volume Down button to scroll and Power key to select.
6 To restart the phone, select "reboot system now"
