In this day and age, mobile communication has become a ubiquitous part of the modern life and most likely covers all forms communication in the near future. The goal of this book is to provide a tutorial introduction to mobile communications by illustrating the theories underpinning the layers within the mobile networks along with surveys on the currently available mobile operating systems. This book begins with a review of the wireless communication emphasizing on mobile transmissions. It further touches medium access controls in mobile and satellite systems. It will also review mobile network layers and discussed how it provides support for mobility. This book further explains and illustrates the three categories of mobile operating systems namely Linux, Windows and others. Finally, this book will touch the programming and coding of three famous mobile operating systems namely Symbian, Android and Windows Phone 7. This book was written as an ideal reference material for science undergraduate and postgraduate students. It can also be use as a guide for research engineers, telecommunications researchers as well as mobile system developers.