Samsung SGH-X427 - Manual (Page 90)

Phone Settings
85
Note: Not all SIM cards have a PIN2. If your SIM card does
not, this menu does not display.
Display Settings
(Menu 4.6)
In this menu, you can change the settings for the display or
backlight.
Contrast (Menu 4.6.1)
This menu allows you to adjust the contrast of the display
screen to see them better in different lighting conditions.
Adjust the contrast using the Up and Down keys or the
Volume keys on the left side of the phone.
Back Light (Menu 4.6.2)
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 for which the backlight is on. 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.