Sounds Settings
From the home page, press OK to open the main menu. Select Settings > Sounds.
Mute All: Mutes all device tones.
Volume: Sets the device volume level.
Ring Until Read: Sets the device to ring until you read a new message. This feature is helpful if you are in a noisy environment.
Message Rec.: Sets the tone that sounds when you receive a message.
Message Sent: Sets the tone that sounds when the you send a message.
Critical Alert: Sets the tone that sounds when the device announces a critical alert.
Power Off: Sets the tone that sounds when you turn off the device.