HTC DROID Incredible - Manual (Page 109)

Messages 109
Received messages
Received notification
Select this option if you want to receive a notification in the status bar
when a new text or multimedia message arrives.
Play notification sound
If you want the phone to ring when a new message arrives, select this
option.
Notification sound
Select a ringtone that is specific to new text and multimedia
messages. Note that the ringtone briefly plays when selected.
Vibrate
Select this option if you want the phone to vibrate when a new text or
multimedia message arrives.
Sent messages
Sent notification
Select this option if you want to receive a notification in the status bar
when a message is sent successfully.
Failure notification
Select this option if you want to receive a notification in the status bar
when a message is not sent successfully.
Play notification sound
If you want the phone to ring when a sent or failure notification is
received, select this option.