What Can I Do During A Call - HTC Rhyme User Manual

74 Phone calls
HTC Caller ID
Everytime you make a call or your friend gives you a ring, you get to see
your friend's latest status update from social networks like Facebook or
Twitter right on the call screen. You also won't miss people's birthdays.
You'll see a birthday reminder, if your friend's birthday will occur sometime
within the next seven days.

What can I do during a call

When a call is in progress, use the buttons onscreen to mute or unmute the
microphone or to turn the speakerphone on or off. You can also press
MENU and choose other options such as muting the microphone, and
more.