One of the latest concept mobiles is the EXO Smartphone designed by Benjamin Lotte.
Inspired by the skeletal system, the EXO Smartphone employs the same design with a rib cage-like design that's suppose to protect the insides of your phone under any circumstances. The exterior skin and the OLED screen are both flexible, which helps with grip and comfort. It'd be interesting to see if smartphones will follow a similar concept one day.
The Flexible EXO Smartphone Can Take a Beating