SMS SOUND NOTIFICATION SETTINGS
Inbound SMS text messages are slipping in unannounced making it difficult for end user to manage in a timely fashion. Customers having inadvertently silenced their SMS text messages sound notifications can easily reactivate them by following these quick steps.
1. From the Messaging application, tap menu icon in top right corner.
2. Tap Settings from the Messaging menu.
3. Tap Notification option
4. Tap Notification sound then select a sound from the list.