Earlier this week, Charlie Miller was booted off the app developer program for exploiting a security flaw in iOS. He published an app, which on face value, was a piece of software for keeping up to date with the stock market.Â InstastockÂ wasn’t an innocent app though, it contained a hidden ability. Miller controlled the app once it was installed and could Â do virtuallyÂ anything he wanted with the phone. Remotely, through his home PC, he could access address books or make your phone vibrate. In the video below he demonstrates how it works.