onomic transformation requiring a reconstruction of the industry's value network [2,3]. It is not easy to complete this transformation. We can identify various developing paths in different countries, because the involved companies and govern- mental departments have taken different policies and strategies. What are the success factors and problems in those paths? Are there any common successful strategies that can be referenced by others? Aiming to answer the questions, we select three typical countries in terms of market revenue, market size, and technology-the United Comparative Study on the Mobile Data Service Development States, China, and South Korea, respectively, to study their paths of developing mobile data services. The policies and strategies are largely different in these three countries. Although we narrow the range of analysis down to three specific countries, we believe that their unique characteristics provide us with a broad spectrum of governmental policy, market, level of technology development, and business strat- egy. Therefore, the results of comparison can cover important issues in mobile communication industry and have significant insights for most other countries. 13.2 Methodology 13.2.1 Terminology and Abbreviations In this chapter, the term "mobile services" only refers to the commercially available mobile communication and information services based on terrestrial facilities. Mobile satellite services are excluded. And "mobile data services" are considered to be the delivery of nonvoice information to a mobile device, including broadcasting and two-way services. Besides, some abbreviations used in this chapter are defined as follows. Mobile network operators (MNOs) refer to the facilities-based providers that possess mobile communication infrastructure to provide mobile communica- tion services. Mobile virtual network operators (MVNOs) do not have the necessary infra- structure, but they provide services to the public by purchasing airtime or leasing facilities from an MNO. Value-adde