Samsung SGH-P107BSACIN - Manual (Page 25)

Your Phone
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Main Screen Display
Your phone has a main screen display. It indicates that you
have an incoming call or a message, and notifies you at
the specified time when you set an alarm.
Service Light
The service light is above the external display on the folder
cover. It flashes when services are available on the phone.
To activate or deactivate use of the service light, set the
Service Light menu option (Menu 6.7.4).