HTC Desire Z User Guide - Page 47

47 Phone calls Turning the speakerphone on or off during a call To turn the speakerphone on, you can do any of the following:  Flip your phone over during a call (be sure that Flip for speaker is selected in HOME > MENU > Settings > Sound).  On the call screen, tap . The speakerphone icon ( is on. ) appears in the status bar when the speakerphone To turn the speakerphone off, just flip the phone over again, facing it up. Or tap again. To decrease potential damage to your hearing, do not hold your phone against your ear when the speakerphone is on. Muting the microphone during a call On the call screen, tap to toggle between turning the microphone on or off. When the microphone is turned off, the Mute icon ( ) appears in the status bar. Ending a call Do one of the following to end the call:  On the call screen, tap End call. If the phone display is off, press POWER to turn on the screen so you can tap End call.  Slide open the Notifications panel, then tap .  If you are using the provided wired headset, press the button to end the call. If the phone number of the person who called is not in your contacts list, you can choose to save the number to your contacts list after you hang up.