Somebody calling himself bamf-hacker in an online forum has claimed that there is a trick to use Siri to access Bluetooth and other settings by using your voice. Following is the procedure to make this fantasy come alive:
All right! Siri is in news once again. This time for a proximity sensor. iFixtit had recently carried out a teardown of iPhone 4S and found a component that could not identified immediately. It was determined later that the component is a Light Emitting Diode(LED). This LED acts as a secondary proximity sensor.