Samsung SCH-R710XKBCRI - Manual (Page 24)

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1. Power / Accessory Connector:
Connect charging accessories
or other optional accessories.
2. Volume Key: Press to adjust
rington volume in Standby
mode, adjust voice volume
during a call, or mute the
ringtone for an incoming call.
3. Camera Key: Press to launch
the Camera-Camcorder.
4. Lock / Voice Service Key: Press
to lock the phone keys and
screen. From a Home screen,
press and hold to launch Voice
Service voice recognition.