Samsung SCH-R680WRAUSC - Manual (Page 18)

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Front View Features
1. Light and Proximity Sensors: Light sensor adjusts screen
brightness when Brightness is set to Automatic brightness.
(For more information, refer to “Brightness” on page 90.)
During a call, Proximity sensor detects that the phone is
next to your face and darkens the screen to save battery
power.
2. Menu Key: Press to display options for the current screen.
3. Microphone: Passes your voice to other parties in a call.
Passes your voice to Voice Dialer. (For more information,
refer to “Voice Dialer” on page 76.)
4. Home Key: Press to display the Home screen. Press and
hold to display the Recent applications screen.
5. Back Key: Press to return to the previous screen or option.
6. Earpiece: Listen to callers.
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