Notifications: Checkmark to allow your phone to receive a notification in the Status Bar whenever you receive a new message.
New message pop-up: Checkmark to show a pop-up when new messages are received which allows you to directly respond in the pop-up window.
Preview: Checkmark to preview message contents when a new message is received.
Notification sound: Tap to select the ringtone to sound when you receive a new message notification.
Vibrate: Tap to set when the phone will vibrate for a new message notification. Choose from Always, While in vibrate only mode, and Never.
Repeat alert: Tap to set how often the phone will repeat the alert for unread messages. Choose from Every 2 min, Every 5 min, and Never.