Power Key: Hold to turn on/off Silent or vibrate or Airplane mode, or to power off or Reboot Device. Press to switch your phone to Sleep mode. Press to wake up your phone.
Home Key: Press to return to the Home Screen from any application or screen. Hold to see Google search.
Menu Key: Press to get the options for the current screen. Hold to see recently used applications.
Back Key: Press to go to the previous screen.
Volume Up/Volume Down: Press or hold to turn the volume up or down.
Touch Screen Gestures: Touch to select items. Touch and Hold to open options. Swipe or Slide to navigate. Drag to move items. Pinch to zoom. Rotate the screen to change orientation.