Samsung SGH-D415MSATMB - Manual (Page 122)

Phone Settings
119
Back Light
You can select whether or not the phone uses the backlight. A
marginal increase in standby/talk time can be achieved by
turning the backlight off.
Select the length of time the backlight is on for. The backlight
turns on when you press a key or receive a call or message
and remains on for the specified length of time.
If you do not want to use the backlight, select Off.
Service Light
This menu allows you to select whether or not the service
light is used. It also allows you to select a color in which the
service light flashes.
Select one of the seven color settings. When the phone is
ready for use, the service light flashes in the appropriate
color.
If you do not wish to use the service light, select Off.
Graphic Logo
This menu allows you to display your service provider’s logo
instead of its name.
Off: the service provider’s name displays in Idle mode.
On: the service provider’s logo stored in your phone displays
in Idle mode; if no logo has been stored, the service
provider’s name displays.