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The following options are available. ON: you can press any key except OFF: you can only press the
Short: the backlight comes on when you press a key or receive a call and switches off 10 seconds after the last key is pressed. Long: the backlight comes on when you press a key or receive a call and switches off 20 seconds after the last key is pressed. OFF: the backlight is not used.
ON: the service light flashes when the phone is ready for use. OFF: the service light is not used.
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