From the home screen, tap the All Apps icon.
Note: To quickly set the phone to Vibrate Only, press the Volume Down button until the vibrating device icon appears.
Scroll to and tap Settings.
Scroll to and tap Sound.
Ensure the Sound profile is set to Normal.
Tap Vibrate to enable or disable the feature for calls and notifications.
Note: The Vibrate checkbox is disabled when the Sound profile is set to Silent or Vibrate.
Scroll to Vibrate on touch and tap to enable or disable vibrations when pressing soft keys and on certain user interface interactions.
The vibration settings are now set.