sanctioned associates. In addition, the game will work only on test-enabled devices, meaning that Qualcomm must give its approval after it checks and tests the software. The main advantages of BREW include its robust- ness, its acknowledged success in the United States, and its favorable terms for developers. Its disadvantages are the tight control that Qualcomm exerts and the fact that it runs only on CDMA phones. IN-FUSIO's (www.infusio.com) ExEn is best known for its business model, which supports a variety of revenue models, including pay-per-level and SMS high scores. Its disadvantages lie in the fact that it is a single-vendor system and has been deployed in only a small number of networks. Mophun In the Synergenix Interactive Mophun (www.mophun.com) development environ- ment, games are developed in C/C++, using an open and free SDK that is available upon request from Mophun. A complier is used to make the translation to a system- independent application. Because the application is required to be certified to run on a mobile phone, there are no freeware Mophun games. Mophun's main advantage is Chapter 16 Emerging Wireless Applications its technical performance, and its key disadvantage is that it can be preinstalled only on Sony-Ericsson devices. Mobile Video Video telephony is 3G's chief differentiator, its signature service. Delivering high- quality video is crucial and is generally not done in many 3G networks when they launch. The number-one complaint operators receive has to do with video quality. Commonly referenced problems with mobile video include jerky video, sync prob- lems between video and audio, poor lip synchronization, inability to deal with fast- moving images, blank picture transmission, long times required to establish video calls, unavailability in some places, and enormous battery consumption. QoS is dif- ficult to guarantee, and there is not enough bandwidth. These problems are com- pounded by the fact that 3G video quality has to compete with benchmarks set by streaming video on the I