In an active call, use the Mute button to cut off all the audio transmission from your phone. When you enable this feature, the phone illuminates the Mute button, and you can hear the caller, but the caller cannot hear you. When the mute feature is active for a while and, if you talk, the phone plays an audio mute-alert notification, with a flickering mute icon on the top bar of the phone screen. Initially, the phone notifies with an audio and visual alert, followed by only the visual alert if you continue talking on an active mute until you unmute the call.