Abstract: A hand-held mobile personal computing and communications device offers full operating system functionality and performance of modern laptops and desktop personal computers, along with seamless networking and session and application persistence for supporting voice, video and data communications. The device uses an ultra low voltage processor and ample low power mass storage for effectively running complete versions of modern operating systems and associated applications with extended battery life. The device also utilizes modular peripherals to extend battery life and increase the effectiveness of the overall system. The device includes multiple broadband wireless communications technologies along with integrated cellular communication technologies for supporting real-time voice, video and data transmission. Various processes are provided for managing connectivity and communications.