The hacker posted a video to YouTube demonstrating the feat which we've embedded below.
Winocm also recently demonstrated an untethered jailbreak of iOS 7.1 running on the iPhone 4. More details on that can be found here.
Later this year, winocm will be going to work for Apple. It's unclear if he will be releasing any of his of exploits before then; however, you can follow iClarified on Twitter, Facebook, Google+, or RSS for updates.
Take a look at the video below!