1. Power off the device by pressing and holding the Power key.
2. Press both Volume Up and Power button and hold them for a few seconds.
3. Feel free to release held buttons after an Asus logo appears on screen.
4. Now choose Recovery option - press Volume Down to select it and Power button to confirm.
5. Android logo will come on screen. When it does, press and hold Power button.
6. Continue holding the Power button and press, just once, Volume Up button.
7. Woozah! You've reached the desired mode!
8. Scroll through the options using Volume buttons; select them with the Power button.