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You can select the message tone you want to hear when you get a message.
Find "Notification settings"
Press the message icon.
Press the menu icon.
Press Notification settings.
Turn on notifications
Press Notifications until the function is turned on.
Select message tone
Press Notification sound.
Press the different message tones to listen to them.
Once you've found a message tone you like, press OK.
Return to the home screen
Press the home icon to return to the home screen.