1. Press Power button until the phone turns off.
2. Next, press and hold these buttons simultaneously: Volume Up & Power. Let go of them after the Boot Mode starts.
3. Select Recovery by using Volume Up and Volume Down buttons.
4. Open Recovery Mode by press-holding the Power and pressing, just once, Volume Up button.
5. Yaay, you are now in Recovery Mode. Navigate it with Volume buttons; select options with Power button.