iPhone completely mute button [ June, 7]
Even the mute button on the iPhone to open, SMS, Siri, ringtones, etc. will still be kept intact, in the "critical moment" sound people very embarrassed.
This plug in the headphone jack mute button on weekdays as headphone plugs, like not prevent you from listening to music, watching movies, and in the need to mute simply rotate it 90 degrees to get a quiet world.
In fact, it is itself a headphone jack, but with a headset plugs two functions, allowing you to adjust as needed, to avoid embarrassment.