We've already shown you how the next-generation iPhone 5 will look like in a 3D video illustration. Now, a purported black iPhone 5 with what was referred to as a back "matte" finish just debuted on YouTube. The iPhone 4S is compared to the alleged new iPhone, and the latter looks considerably thinner and taller. The dummy device even turned on and displayed the famous "Connect to iTunes" message. Enough with the reading watch the video!