1. First of all, turn the device off by holding down the Power key.
2. Press and hold Volume Up + Power at the same time for a few seconds.
3. You can release held buttons when the Android image appears.
4. Select the "Recovery" option by pressing Volume Down to select it and Power button to confirm.
5. Done, you're in the Recovery Mode.
6. Use Volume buttons to scroll and Power button to select options.