Samsung SGH-C225NBATMB - Manual (Page 81)

Phone settings
81
Auto key lock
When the Auto Key Lock feature is enabled, the phone keypad
is locked and you must press the Unlock soft key then press
the
key. The phone displays Keypad active.
If you wish to keep your phone unlocked, you must go into the
settings and change the option to Off.
The following options are available.
Off: the keypad is not locked.
15 Seconds: the keypad is locked after being idle for 15
seconds
30 Seconds: the keypad is locked after being idle for 30
seconds
1 Minute: the keypad is locked after being idle for 1 minute
2 Minutes: the keypad is locked after being idle for 2 minutes
Contrast
This option allows you to adjust the contrast of the display
screens to make them lighter or darker.
To adjust the display contrast, proceed as follows.
1. Adjust the contrast by using the and navigation keys
or the Volume keys on the left side of the phone.
2. When you are satisfied, press the OK soft key to save the
selection.
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.
The following options are available.