title: How to turn on/off airplane mode, even on new Android versions (and even with root)?
body: <p>Starting with Android 4.2 , turning on/off airplane mode isn't supported using normal APIs.</p>
  
  <p>It should probably work when WRITE_SECURE_SETTINGS permission is granted, but that's only for system apps (as I've read).</p>
  
  <p>What should be done in order to do it on devices with root?</p>
  
  <p>Should a system app also require root in order to toggle airplane mode?</p>