Samsung SGH-X640 - Manual (Page 26)

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Answering a second call
You can answer an incoming call, if your network
supports it and you have activated the call waiting
feature.  p. 31
1. Press [ ] to answer the call. The first call is
automatically put on hold.
2. Press <Swap> to switch between the calls.
3. Press <Options> and select End held call to end
the call on hold.
4. To end the current call, press [ ].
Transferring a call
You can transfer the current call to the call on hold so
the callers can talk to each other.
Press <Options> and select Transfer.
Using the loudspeaker
You can talk and listen to the phone a short distance
away.
Press <Options> and select Loud spk. on or Loud
spk. off.
Using the voice clarity feature
This feature removes extraneous noise and increases
call quality so that the person with whom you are
speaking can hear you clearly even if you are in a
noisy place.
Press <Options> and select Voiceclarity on or
Voiceclarity off.
Switching off the microphone (Mute mode)
You can temporarily switch off your phone’s
microphone so that the person on the phone cannot
hear you.
Press <Options> and select Mute or Unmute.
Muting or sending key tones
You can turn the key tones off or on.
Press <Options> and select Mute keys or Send
keys.
To communicate with answering machines or
computerised telephone systems, Send keys must
be selected.