Customize a sound set by choosing different sounds for different notifications such as for new email, calendar reminders, and more. You can choose from the preset selection or your sound files (except for notification sounds).
From the Home screen, tap
Choose a sound set you want to customize or create a new one, and then tap Apply.
Change the notification sound and alarm from the Personalize screen.
Go to the respective apps such as Mail and Calendar to choose notification sounds to use for these apps.
HTC Jetstream automatically saves your choices to the current sound set.