robertk328
Moderator
Not according to Apple! Because it does not mute everything.
What the ring/silent switch does NOT mute:
Alarms from the Clock app (example, setting an alarm to go off at 6 am).
Timers from the Clock app (example, setting a 15-minute countdown timer).
Audio from the iPhone’s Music app (example, playing the Beatle’s “Hey Jude”).
Audio from the iPhone’s Video app (example, playing an episode of Lost).
Some audio from third-party apps like streaming radio, video, and music (examples, playing a radio station via the TuneIn Radio app or a video in the YouTube app).
Tones when tapped in the iPhone’s various settings (for example, when changing your ringtone or text-message alert tone) and in the Clock app (for example, when selecting what sound the iPhone will make when the timer runs down to zero).
Tones when changing the volume of Ringer and Alerts in Settings–>Sounds
A sound alert when sent from the Find My iPhone service.
Government alerts, including the Amber alert.
If all that stuff still makes noise, it's not all that silent either!