Blog Apple.pro is reporting that Apple is testing three different iPhone 5 prototypes, one featuring a slide-out physical keyboard. A physical keyboard on an iPhone would a huge stray away from the company’s sturdy stand on keyboard-less interfaces, though due to competition and the fact that there are still a ton of people out there who love the physical QWERTY (i.e. Blackberry users), Apple is taking note of this marketshare. Also reportd, two prototypes are similar in design to the iPhone 4, though at least one features an upgraded 8-megapixel camera and a thinner case compared to the current iPhone model.