Samsung SPH-M320 User Manual page 11

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Adjusts the phone volume.
Volume
keys (on the
In Idle mode, with the phone open, adjusts
left)
the keypad tone volume. With the phone
closed, hold down to turn on the backlight.
In Menu mode, scrolls through the menu
options.
Turns on the external speaker during a call.
Speaker
phone key
In Idle mode, retrieves the last number
(on the right)
dialed, received, or missed.
Holde down to start the voice recognition.
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