Cell phones are becoming the most ubiquitous technology. Researchers in various other disciplines in behavioral sciences have been extensively examining how people use cell phones and what influences cell phone use have on people’s lives for more than 20 years. This review paper provides an overall picture of the science of cell phone use by sketching the past, present, and future of this emerged field of study. After a short introduction, it presents an overview of the literature search methods used in this study and a brief history of the science of cell phone use, provides a detailed review of five major areas and six specific topics of the field, and ends with an outline of future directions of research.