HTC One (M8) - What Can I Do During a Call

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.
Turning the speakerphone on or off during a call
To decrease potential damage to your hearing, do not hold
HTC One to your ear when the speakerphone is on.
§ On the call screen, tap . The speakerphone icon appears in the
status bar.
§ To turn the speakerphone off, tap .
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.
§ Slide the Notifications panel open, then tap .
Video chat and phone calls 169