How to turn off FaceTime on your iPhone, iPad, and Mac

Want to listen in on your friend’s conversations? Thanks to a bug in Apple’s FaceTime service, all you need to do is call them via FaceTime on their iPhone or Mac. You can then use their phone’s microphone to hear what’s going on, even if they don’t pick up the call.
This serious bug is now known by anyone who reads tech news. (It has been tested and verified by The Verge staff.) It’s actually quite easy to prevent anyone else from invading your conversationa