The book provides a global view of mobile communication technologies penetration, adoption and use. It is global because of the widespread deployment of such technologies worldwide, as the authors claim. For that, both qualitative (especially case studies) and quantitative studies are used as a framework to elaborate and reinforce the authors presented arguments.
However, there are many limitations to this view as the study lacks some cross-referenced data to allow comparisons in different contexts in different countries. Further, it sometimes provides a slightly shallow view on a topic, especially when addressing developing countries (allegedly the main focus of the book) where many current trends still have only incipient researches. A reader interested in a deep understanding of economic implications of mobile communication technologies diffusion, for example, would need to dig the book's references and investigate the topic him or herself.
Another issue worth noting is the apparent lack of understanding of some technical fundamental aspects of mobile communications by the authors. In this context, new trends such as the role of technology convergence (through the use of IP networks) are missing and others such as the diffusion of viruses are completely biased (viruses as of this day is still not a threat for mobile devices).
Despite those issues, the authors raise categories (both economical - GDP, pricing systems, technology infrastructure, etc. - and social - age groups, gender, ethnicity, culture, etc.) and trends (collective sharing of mobile phones, prepaid services in poorer communities, the active role of young people, etc.), putting them together in a qualitative perspective that leads to what the authors called the "Mobile Network Society".
Overall, the book allows a fairly broad understanding of the topic and it is a good starting point for any researcher interested in overcome or build on top of the current understanding of this phenomenon.