Grab your iOS7-running iPhone and activate Siri. Now say one of the following…
Change the brightness
… and various combinations thereof. You’ll be rewarded with switches and sliders to adjust these settings right there on the Siri screen. Pretty good huh?
This only works for certain settings: You can adjust Bluetooth and brightness, but you can’t switch on the flashlight. You can, however, tell Siri to enable Airplane mode, but he’ll warn you that he’ll die if you do.
In fact, you can just ask Siri “What can you do?” and he’ll throw up a list for you, right there in the screen.