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The message tone is the sound you'll hear when you get a new text message. Follow these instructions to select a message tone.
Find "Message alert tone"
Scroll to Settings and press Select.
Scroll to Tone settings and press Select.
Scroll to Message alert tone and press Select.
Choose message tone
Highlight the different message tones and wait a moment to hear them.
Once you've found a message tone you like, press OK.
Press Disconnect to return to standby mode.