Interacting without keyboards has become easier thanks to developments like the iPhone with its intuitive touch screen interface. During its development, Apple patented every aspect of the proprietary technology, leaving little for other mobile-phone manufacturers to improve upon.
But Nokia has filed for their own proprietary “Touch User Interface”, which measures the hand and finger movements in a 3D space around the device. The Nokia S60 3D Touchless Device Control Interface.
Ultrasonic Transducers (USTs) arranged around the perimeter of the display allow the device to respond to hand and finger movements without requiring the user to touch the screen.
So you won’t have to clean your fingerprints off your screen !