iPhone

iPhones have no built in water eject feature, unlike the Apple Watch, so the tone has to come from somewhere else.

Safari on iOS does not expose the Vibration API, which is why that button does nothing on every speaker cleaning site.

The earpiece and the loudspeaker are separate hardware, so call audio problems need a separate diagnosis.

A tone that will not play is the most common reason people think a cleaning tool is broken.

AirPods mesh is finer than a phone grille and far less tolerant of pressure.