Samsung SGH-T609 User Manual page 22

Appears when a new multimedia message has been
received.
Appears when you set an alarm to ring at a specified time.
For details, see page "Alarm" on page 141.
Appears when you are out of your service area.
Appears when a call is in progress.
Appears when the Call Forwarding feature is active. For
details, see page "Call forwarding" on page 109.
Appears when Alert type is vibration or you set the phone
to vibrate when you receive a call.
Appears when Silent Mode is active.
Appears when Mute is active.
Shows the level of your battery. The more bars you see,
the more power you have remaining.
Appears when Bluetooth wireless technology is active.
Backlight
The backlight illuminates the display and the keypad.
When you press any key or open the phone, the
backlight turns on. It goes off when no keys have been
pressed within a given period of time, depending on
the setting in the Backlight menu.
The On setting is how long the keypad backlight is on.
You can select 15 seconds, 30 seconds, 1 minute, 3
minutes, or 10 minutes.
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