We had heard the iPhone 15 Pro may be getting an Action button instead of a mute switch, but we didn't really have any idea what it was for. That was until Steve Moser at MacRumors found a surprising explanation in iOS 17.
As of iOS 17 beta 4, code exposing the Action button's potential settings are visible if you look for it. From the visible parts of the code, it appears that the Action button will have presets letting you assign a Camera, Flashlight, Translate or Voice Memos app shortcut, enable the display Magnifier or other Accessibility options, or activate Shortcuts and Focus modes. That's in addition to the option to trigger good old Silent Mode as the current iPhones' mute switch does.
