As if we didn't need another reminder of what to expect on September 12th, we'll give it another shot as this appears to be the real deal.
The above video shows an iPhone 5 compared to the 4S, and confirms everything we already know about the new iPhone, and more. According to the source this is a prototype, and was allegedly "discovered" out of production for a photoshoot and video of it booting (as well as the comparisons to the 4S) by a "friend" of someone who works at the Jincheng, Foxconn plant in China’s northern Shanxi province.
Aside from what we already know about the iPhone, this one comes preloaded with iOS 6 and after booting displays the (error) message:
“This device is not registered as part of the iPhone Developer Program. If you are a member of the program, please register your device in the @@url@@.”
It's also quite plain to see that the home button does in fact appear to sit a little deeper than that of the iPhone 4 variants; of course all of this will be confirmed in just under a week when Apple will announce the device, which is yet to be named.
If it follows the iPad naming, we can expect "the new iPhone" or simply iPhone 5; all this remains speculation as the back of the iPhone prototype doesn't reveal any naming and is purposely masked.
The source added that each worker at the Jincheng factory needs to complete up to 3,000 iPhone 5 back panels every night since mass production commenced.
Update: Some people over at MacRumors are claiming this is infact a fake, and while we can't be sure either way, as usual, take whatever leak news with a grain of salt. Thanks for the tip in our comments.