HTC HD2 User Manual page 59

To use the speakerphone
Placing your phone face down automatically turns on the
speakerphone. To turn the speakerphone off, place your phone
face up.
You can also tap the onscreen Speaker button (
hold the TALK/SEND button to turn the speakerphone on or off.
The speakerphone icon (
speakerphone is on.
Warning! To decrease potential damage to your hearing, do not hold the
phone against your ear when the speakerphone is on.
To mute the microphone during a call
Tap the Mute button (
the microphone is turned off, the mute icon (
screen.
To take two calls and switch between the calls
1. Press the TALK/SEND button to accept a second call, or tap the
Add Call button (
on hold when you accept or dial the second call.
2. To switch between the two calls, tap the Swap button (
tap the dim area onscreen that shows "On Hold".
To end calls
To end the current call, tap End Call or press the END/POWER button.
If you have two ongoing calls, tap Menu > End All Calls to end both
calls.
) appears in the title bar when the
) to turn the microphone on or off. When
) to dial a second call. The first call is put
Chapter 2 Phone Calls 
) or press and
) appears on the
) or