Value-added services—messaging, mobile-commerce, location services, content provisioning—are the moneymakers in today's telecommunications market. This book shows you how to commercially offer these services without having to own network infrastructure. It explains all the relevant technologies that enable value added services in plain style without assuming in-depth knowledge of telecommunications. You learn how to offer pre-paid telephony over a third party's network, route calls inexpensively over the Internet, build and market mobile applications with short messaging (SMS) and multimedia messaging (MMS), and explore the commercial possibilities of cell broadcasting (CBS).