1. Power down the phone.
2. Then press and hold the Volume Up and Down buttons for three seconds. As you hold them, press and release the Power button.
3. A menu will open. From it, select Recovery. Use Volume Down to navigate the menu and Volume Up to confirm your choice.
4. Press and hold the Volume Up button for three seconds when an Android icon appears on the screen. Press and let go of the Power button.
5. Recovery Menu should now open. Use Volume Down to navigate it and Volume Up to confirm your choices.