Vibrate Mode - Samsung Galaxy S® III

  1. From a home screen, select Apps (located in the lower-right).
  2. From the Apps tab, select Settings.
  3. From the Device section, select Sound.
  4. From the Ringtone and notifications section, select Ringtones.
  5. Select Silent then select OK.
  6. Ensure Vibrate when ringing is selected (checked Check mark icon).