This is a replica of Yuno Gasai's phone from Future Diary (Mirai Nikki). It's designed to use a thick wire as a hinge. This version includes some improvements to the Mk 1, such as a redesigned hinge section that eliminates the gap between halves of the phone when open, seperate camera parts to make painting easier, and some new parts for the screen. I haven't actually watched the series yet so I had to do a little guesswork for the screen image itself, but hopefully portal fans will get the hidden reference. In the photo shown it's the green phone on the right.