Samsung A640 - Manual (Page 38)

16 Section 2A: Your Phone: The Basics
12. Power Interface Connector allows you to plug in the travel
charger that was included with your phone.
13. Microphone allows other callers to hear you clearly
when you are speaking to them.
14. Plus Code Dialing Key automatically dials the
international access code for the country in which you
are located (for instance, 011 for international calls
placed from the United States).
15. Space/Pound Key enters the pound [#] character for
calling features. In text entry mode, press to enter a
space.
16. Camera Key allows you to capture a picture when you
are in camera mode.
17. Back/Clear Key deletes characters from the display in
text entry mode. When in a menu, press the Back key to
return to the previous menu. This key also allows you to
return to the previous screen in a Sprint PCS Vision
session.
18. Speakerphone/Voice Signal Key in stand-by mode, press
and hold to launch voice signal. Press once to display
the recent call log. If the flip is closed, press and hold
with the Ready Link key to disable/enable the key guard.
While on a call, press to turn speakerphone on or off.
19. End Key/Power ends a call. Press and hold this key for
two seconds to turn your phone on or off. While in the
main menu, it returns the phone to standby mode and
cancels your input. When you receive an incoming call,
press to enter silent mode and mute the ringer.
20. Menu/OK allows you to access the menu screen. It also
allows you to accept choices when navigating through a
menu.