This guide bridges the gap between ubiquitous computing (UBICOMP) and third generation mobile communications. Scenarios indicate how new applications will be developed, and how to implement them. The text presents distinguishing characteristics, advantages and disadvantages of key technologies to help practitioners determine if a certain implementation is feasible, and what performance level might be expected. It features an informative discussion on how mobile network operators plan ongoing services and manage resources, and also takes a look at future trends in this evolving area.