The iPhone 5 is said to use a rubber or plastic material that will be built into the case – presumably as the bezel surrounding the front edge of the phone. The back of the phone is said to be made from aluminum and will have a redesigned antenna system that surrounds the device. Lastly, the iPhone 5 is supposed to feature a 4″ display as well. As usual, these are just rumors at this point in time – and with no proof or evidence, they’re as good as made up stories but the idea of an aluminum-back iPhone does seem interesting. Stay tuned.