Cellular phones including smartphones and tablets have become an integral part of our lives. This book describes how the cellular phones and the cellular networks communicate with each other.The first part of the book introduces cellular communications by depicting, in detail, the ecosystem, phases, and performance of cellular systems. Digital modulation and demodulation, radio frquency propagation, cellular frequency propagation, signal strength, and internet protocol are also covered.The second section provides a comprehensive overview of GPRS (General Packet Radio Service), EDGE (Exchanged Data Rates for GSM Evolution), GSM (Global System for Mobile Communication Systems, CDMA (Code Division of Multiple Access), WCDMA (Wideband Code Division of Multiple Access), IS-95 (Interim Standard-95), and 1x Evolution. The section also covers topics suchas high-speed downlink packet access, forward link channels, reverse link channels, high-speed uplink access, and HSUPA channels.The third section serves to describe 4th Generation or 4G technology and WiMax (Worldwide Interoperability Microwave Access) in extensive detail.If you are an instructor and adopted this book for your course, please email ieeeproposals@wiley.com to get access to the instructor files for this book.