1. Turn off the phone.
2. Press-hold the Power and Volume Down buttons.
3. Let go of Power when an Android logo pops on-screen. Let go of Volume Down when the Boot mode starts.
4. Now select Recovery option. To do that, use Volume buttons to navigate the menu and Power button to select the option.
5. Android logo will appear once more. When it does, press-hold Volume Up and press Power.
6. Well done, you're now in Recovery Mode menu.