You can set notification options, such as vibrate or tone, for BlackBerry® Messenger in the sounds application. The BlackBerry Messenger New Message item specifies how you are notified of incoming BlackBerry Messenger messages. The BlackBerry Messenger Alert item specifies how you are notified when a contact that you have set an availability notification for becomes available. The BlackBerry Messenger Groups item specifies how you are notified of BlackBerry® Groups activities.
Depending on the sound profile that is set in the sounds application on your device, you might not receive the audible notification that you have set for BlackBerry Messenger. Depending on the options that are set in a group, you might not receive audible notification of group activities. You cannot turn off or change the success beep for barcode scanning.