1. Turn off the tablet by holding the Power button.

2. Next, press and hold together Volume Up + Power button for a while.

3. Phone will vibrate. When it does, release the Volume Down and press Volume Up key.

4. Release held keys when the Boot Mode appears.
5. You will see a meny. From it, select Fastboot by using Volume Up to scroll and Volume Down to confirm.

6. Good work, you now should see the Fastboot Mode menu.