"Storied mobile communication researchers Jonathan Donner and Richard Ling have given us a savvy, panoramic view of how mobile communication has changed and is changing lives around the world. They reveal how portable communication technology is affecting every level of human endeavor, from socioeconomic transformations in the developing world to mischief in the classroom. Their adroit treatment is required reading for anyone interested in the subject." James E. Katz, Rutgers University