1. First, turn off the phone.
2. Press-hold the Volume Down for three seconds. As you hold it, press the Power button.
3. Select Recovery - use Volume buttons to navigate to the option and Power to select it.
4. Android logo will appear after a while. When it does, press and hold Volume Up and press Power button.
5. Awesome, you should now be in Recovery Mode. Use Volume to navigate the menu and Power to select options.