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

74 Phone calls
Place HTC Rezound with Beats Audio face down on a level surface.
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If HTC Rezound with Beats Audio is already facing down, it will still
ring when there are subsequent incoming calls.
Look who's calling
Every time you make a call or your friend gives you a ring, you get to see
your friend's latest social network status update right on the call screen.
You'll also see a birthday reminder, if your friend's birthday will happen
within one week.

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.