Edward Snowden designed an iPhone attachment that detects unwanted radio transmissions

Edward Snowden thinks about phone security a lot more than the average person. And with good reason, as the world-famous whistleblower revealed methods of government data collection on phone calls, and even from his exile in Russia, still remains a major advocate for digital privacy.
Snowden, together with hacker Andrew "Bunnie" Huang, announced today at the MIT Media Lab a design for a case-like attachment to modify an iPhone, allowing you to monitor if and when the radio transmitters with