LG LG530G - Manual (Page 19)

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Rejecting an Incoming Call
You can reject an incoming call without
answering by simply pressing the End/Power
Key
.
Muting the Microphone
You can mute the microphone during a call
by pressing the Right Soft Key
Mute. The handset can be unmuted by
pressing the Right Soft Key
Unmute. When the handset is muted, the
caller cannot hear you, but you can still hear
the caller.
Using the Speakerphone
You can use the integrated Speakerphone
during a call by pressing the OK Key
.
The loudspeaker is automatically deactivated
when you end the call.
Warning
Due to increased volume levels, do not
place the phone near your ear while the
speakerphone is enabled.
Making a Second Call
You can make a second call while currently
on a call simply by entering the second
number with the keypad and pressing the
Send Key
. When the second call
is connected, the first call is automatically
placed on hold. You can swap between calls
by pressing the Send Key
.