1. Press the Volume keys to adjust the device volume.
   
2. To enable Vibrate mode, lower the volume until the Vibrate icon appears.
   
3. When Vibrate mode is enabled, the Vibrate icon will display in the notification bar.
   
4. To enable Silent mode, lower the volume until the Silent icon appears.
   
5. When Silent mode is enabled, the Silent icon will display in the notification bar.
   
6. To adjust further volume settings, tap the Settings icon.
   
7. Adjust settings as desired.
   
8. To change ringtones and alert notifications, swipe down from the Notification bar. Then tap the Settings icon.
   
9. Under the 'Device tab', tap Sounds and notifications.
   
10. To change the ringtone, scroll to then tap Ringtones.
    Note: For steps to assign a ringtone to a contact, search tutorials for 'Contacts'.
    
11. Select the desired ringtone, then tap OK to set.
    
12. To use a song as a ringtone, tap ADD.
    
13. Select the desired song, then tap DONE.
    
14. To change the notification sound, tap Notification ringtone.
    
15. Select the desired sound, then tap OK.
    Note: To block or unblock notifications from appearing when the device is locked, go to Settings > Sound & notifications > While locked.