Samsung SCH-U310ZNAVZW - Manual (Page 19)

Understanding Your Phone 16
7. Voice Commands Key: Press and
hold to activate Voice Commands.
When flip is closed, press and hold
to activate backlight. When flip is
closed and backlight is on, press
and hold to activate Voice
Commands (headset must be
connected).
8. Power/Accessory Connector:
Connect charging accessories.