The report, from tw.apple.pro claims that Apple is currently working on not one, not two, but three iPhone 5 prototypes. What’s more, it’s rumored that one of these handsets possesses a slide-out hardware keyboard.
Unfortunately, the original report has been run through a very rough translation, but another point raised is the existence of one prototype closely resembling the current iPhone 4 model. This would be akin to the iPhone 3G/3GS update where the exterior remains identical but the innards receive a slight upgrade with improved battery life, faster CPU and more RAM.
The reason this particular rumor caught our eye is thus: tw.apple.pro are the people that got their hands on an iPhone 4's screen long before its announcement, along with a battery from the aforementioned handset. Granted, a good track record doesn’t automatically make these claims true, but it’s a start.