MB865: Hard Reset

Press both Volume keys, and then hold Power.

Wait for Boot Mode to load and use Volume Down to scroll.

Select Android Recovery and press Volume Up when in this mode.

When the logo shows up, press both Volume keys until the menu appears.

Select Factory Reset using Volume buttons and move further with Power.

Choose Yes and confirm it with the same Power button.

After all files all deleted, press Power to choose Reboot System Now.