To mute the microphone during a call

Tap the Mute icon .

The light bar on the Mute icon illuminates blue to indicate that the microphone is muted. If you close the Call screen, the Mute icon will appear in the Status Bar to remind you that the microphone is turned off.

While viewing the in-call screen, you can unmute the microphone by tapping the Mute icon again.

The microphone is unmuted automatically when the call ends.