1. Press-hold the Power button to turn off the phone.
2. Next, press'n'hold the Volume Up and Power buttons for five secónds.
3. Let go of these buttons after the Boot Mode opens. Continue to Recovery - use Volume buttons to select and confirm your choice.
4. Press-hold the Power button for a while. You should now be in Recovery Mode.
5. Press Volume Up just once.
6. Yaay, you're in Recovery Mode.