Samsung SGH-E335IBATMB - Manual (Page 22)

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Section 2
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.
Backlight
A backlight illuminates the display and the keypad.
When you press any key or open the phone, the backlight
comes on. It goes off when no keys are pressed within a
given period of time, depending on the setting in the Back
light
menu. The display turns off after one minute to
conserve battery power.
To specify the length of time the backlight is active, set the
Back light
menu. See "Backlight" on page 86 for further
details.
External Display
Your phone has an external display on the front of the
phone. It indicates when you have an incoming call or
message. It also alerts you at a specified time when you
have set an alarm. The backlight turns on and the
corresponding icon appears on the external display.
When you close the phone, the display shows the current
time on a digital clock.
Service Light
The service light is on the front of the phone. It flashes
when services are available on the phone.