Apparently researchers from the University of Michigan and the University of South Carolina hack a phone by using sound waves. I don't like the sound of that.
"A research team from the University of Michigan and the University of South Carolina found that it’s possible to make your Fitbit, smartphone, or almost anything else with an accelerometer in it respond to sound, the New York Times reports. “It’s like the opera singer who hits the note to break a wine glass, only in our case, we can spell out words,” one of the researchers explained to the NYT. “You can think of it as a musical virus.”"