A US based company created the Prototype of colour flexible display smartphone . You can rolled this smartphone conveniently on your wrist. To receive a call You can use it in two ways either on speaker or removed and straightened into a traditional way. you may end the call by bend it back onto your wrist or cut it in traditional way. Royole Corporation Developed this flexiphone. This phone helps you to track your health. It can monitor your heart rate, distance travel and steps.