Samsung SGH-t309 - Manual (Page 36)

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Sect
ion 3
2. Press the key to dial the second call.
The first call is automatically put on hold.
Or:
1. Press the Options soft key and select Hold.
2. Make the second call in the normal way.
When you have an active call and a call on hold, you may
switch between the two calls, changing the one on hold to
active and placing the other on hold.
To switch between the two calls, simply press the Options
soft key and select Swap.
The current call is placed on hold and the call on hold is
reactivated so that you can continue conversing with that
person.
When you want to finish, end each call normally by
pressing the
key.
Switching off the Microphone (Mute)
You can temporarily switch your phone’s microphone off,
so that the other person cannot hear you.
Example: You wish to say something to a person in the room but do not
want the person on the phone to hear you.
To switch the microphone off temporarily:
1. Press the Mute soft key. The other person can no longer
hear you. The Mute icon is displayed.
To switch the microphone back on:
1. Press the Unmute soft key. The other person can hear
you again.