User interface for a PCS smart phone

New multimedia smart phones for wireless voice and data communications are now available. A novel user interface for a Personal Communications Services (PCS) smart phone is described. The user interface is designed around the unique characteristics of mobile wireless applications. Both the physical characteristics of the phone and the way users interact with applications are unique. The phone has two LCD touch screens in a clamshell casing. It features pen input, handwriting recognition, and a graphical user interface supported by the Inferno operating system. A dedicated writing area and automatic text focus flow make form based applications particularly easy. The smart phone incorporates signature verification for biometric authentication. Apart from being a full featured cellular voice phone, the device also supports a number of applications including Web browsing, electronic mail, fax communications and a directory application which allows users to retrieve contact information.