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You can select the message tone you want to hear when you get a message.
1. Find "Messages notifications"
Slide your finger downwards starting from the top of the screen.
Press the settings icon.
Press Sounds and notifications.
Press Ringtones and sounds.
Press Messages notifications.
2. Select message tone
Press Notification sound.
Press the required message tones to hear them.
Once you've found a message tone you like, press the Return key.
3. Return to the home screen
Press the Home key to return to the home screen.