1. Press the Volume keys located on the back of the device to adjust the volume.
   
2. Press on the Down volume key to reduce the volume until the Vibrate icon appears to enable Vibrate mode.
   
3. When Vibrate mode is active, the Vibrate icon will display in the Notification bar.
   
4. To change the ringtone, swipe down from the top of the screen, then tap the Settings icon.
   
5. Scroll to and tap Sound & notification.
   
6. Tap Ringtone.
   Note: For steps to assign a ringtone to a contact, please see the 'Contacts' tutorial.
   
7. Tap Desired ringtone, then tap OK.
   
8. To silence notification alerts and vibrations, scroll to and tap Do not disturb, then adjust settings as desired.
   Note: To block or unblock notifications from appearing when the device is locked, go to Settings > Sound & notification > Lock screen.