Can the cell phone forever change the way people communicate? The mobile phone is more than simply a technical innovation or a social fad, more than just an intrusion on polite society. This book, based on worldwide research involving tens of thousands of interviews and contextual observations, looks into the impact of the phone on our daily lives, including changes in our accessibility, safety and security, coordination, and use of public places. Based on research done in many countries, the book examines the once unexpected interaction between humans and cell phones, and between humans, period: how the mobile phone is used for "real time" coordination while on the run, how adolescents use it to manage their freedom, and how teens "text" to each other day and night without discovery.