ce service ARPU. In China, the revenues of data services have increased rapidly since 2001, and accounted for averagely 22.6% in 2006 and 25% in 2007 in MNOs' total revenue (see Figure 13.2). In addition to the mobile data service revenue of MNOs, mobile data services have created a new industry of VAS providers and CPs in China. The average margin of providing mobile VAS is around 60% [8], reflecting the high profitability of mobile data services in China. In South Korea, the revenue of data services has steadily increased, but become lower than China since 2006. However, it does not mean that popular- ity of mobile data service starts to decrease in South Korea. This phenomenon 30.0% 25.1% 25.0% 22.6% 21.2% 22.5% 22.1% 20.0% 19.2% 18.3% 15.0% 14.1% 13.3% 10.0% China South Korea Figure 13.2 Mobile data revenue as percent of total mobile service revenue. (Adapted from FCC, Annual report and analysis of competitive market conditions with respect to commercial mobile services (12th report), February 2008, Federal Communications Commission: Washington, DC; China Mobile Limited Annual Report 2001-2007; China Unicom Limited Annual Report 2001-2007; MINTEL, Mobile phone services-U.S. November 2007.) Service Delivery Platforms might be for a temporary period originated from adjusting the current extremely expensive bill system for multimedia service based on 3G network. 13.4 Regulatory Policies and Corporate Strategies 13.4.1 Regulatory Policies Different regulatory policies are observed in the three countries. But basically the telecommunication industry was designed by operators putting first because they possess oligopolistic power based on infrastructure. As a result, an operator-centric structure is found in all three countries. 13.4.1.1 United States In the United States, the promotion of competition was established by the Congress as a fundamental goal for policy formation and regulation on mobile services in 1993. Toward this goal, the major policies from Federal Communications Commission (FCC, the telecom regul