1. Turn off the phone.

2. Now press'n'hold the Power & Volume Up buttons.

3. Let go of both these buttons after the Boot Mode starts.
4. Using Volume buttons, scroll down to and select Recovery.

5. Press'n'hold the Power button when the Android robot appears onscreen. As you hold it, press Volume Up just once.

6. Yaay, you are in Recovery Mode. Navigate it with Volume buttons; select options with Power button.