It's a fake. Not only is it a fake, it's a terrible fake. It has a stout little rattlesnake tail on it, for crying out loud!
This is not the iPhone that will have 4G networking. This is not an iPhone. This is a really fat Bluetooth headset or the ZunePhone's best attempt at good design.
Wow some people are a little harsh today. I suppose if the OP had said mock up or something like that the reaction would've been more pleasant however it should've been pretty obvious to everyone what it was going to be.
It is a mockup, people like doing them. And we like seeing them.