1. Press the Volume keys located on the side of the device to adjust the volume.
   
2. 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. Swipe down from the top of the screen, and tap the Settings icon to access additional volume settings.
   
5. Tap Sounds and notifications.
   
6. To change the ringtone, tap Phone ringtone.
   
7. Tap the Desired option, and then tap OK.
   Note: For steps to assign a ringtone to a contact, please see the 'Contacts' tutorial.
   
8. To change notification alerts, scroll to the Notification tab and adjust Desired options.
   Note: To block or unblock notifications from appearing when the device is locked, go to Settings > Sound & notification > Other sounds > Screen locking sounds.