1. The first thing for you to do is to switch off the device.

2. Press and hold the Power & Volume Up buttons for five seconds or so, until an Android logo appears.

3. You can release held keys when you see the new menu on te screen

4. Using Volume Up to scroll down and Volume Down to choose the option, select Recovery Mode.

5. You are now in Recovery mode - navigate using Volume Up and select options with Volume Down.