Handset
Headset
Enter the phone number, and press .
Speakerphone
Enter the phone number and press or
or or the center key.
Handset or headset and casing speaker
With dual audio mode activated, other persons present in the room are allowed to listen in to the third party over the phone's casing loudspeaker.
When the call has been established, press to enable the casing loudspeaker. Press
to turn the speaker off.