iPhone 4 keyboard attachment

Now here is a concept design for a iPhone case that brings in a physical qwerty keyboard to the 4th gen of the god phone. The design of the case is similar to the iPhone bumper case just that it adds a sliding qwerty over the top of the phone. Now all looks well here, just for the little issue that you need to slide down the keyboard each time you want to use the home button or see the lower part of the screen.
Some concepts are better left as concepts…