1. First, power down the phone by pressing the Power button.
2. Next, hold down the Power and Volume Up buttons for a moment.
3. Let go of buttons held when the Boot Mode comes on screen.
4. Now select Recovery Mode. To do that, use Volume Up to scroll down and Volume Down to select. Lastly, press the Power button.
5. You are now in Recovery mode - navigate using Volume buttons and select options with Power button.