However, as systems grow more complex and diverse, as well as the challenges in managing them. Management services derived from technology used in fixed telephone system and has evolved to support packet-based services in an increasingly open environment. Users will be placed on center stage and the system will be able to handle intelligent user profiles, proactive service selection, context aware service provisioning and ubiquitous computing. Managing Mobile Services Covering the challenges, solutions and technologies for implementing IP-based services in a mobile environment, with particular attention to security, flexibility and charging. This book gives telecommunications / data engineers, operators and service providers as well as students and academics a deep understanding of the issues involved in implementing and managing new value-added services.