The Radia concept phone offer a simplicity form factor with a dynamic touch screen.

The design description stated,

As cellular phones become a standard, the statement they make as a symbol and a fashion accessory has become increasingly important. The Radia phone concept expresses simplicity in form and sophistication in function and user interface. The outer rim, which is made of brushed aluminum makes both a refined professional statement. The touch-display is large enough to read and display many types of information, yet small enough to maintain a pocket-sized device. Simplicity is also expressed in the power button, which is flanked by the earpiece speaker, and balanced by the microphone which is 180 degrees around the perimeter.

Source via gizmodo