title: Can an Android app change the settings of the phone such as sound on/off wi-fi on/off?
body: <p>Can an Android app change the settings of the phone such as sound on/off or wi-fi on/off? Actually, there will be some predefined NFC tags, and when I tap one of these, let's say, wi-fi will be turned on, or the sound will be turned off? Is that possible with an app?</p>