d users generate more than ten times the traffic of a dial-up user-the implication being services rev- enue and an upward pressure on capital expansion. Fourth, handsets and other mobile access devices such as PDAs must become more richly functional. They must support multiple access pro- tocols so that they can connect via not only standard cellular protocols but Bluetooth and 802.11 as well. Most manufacturers already offer these devices; growth will continue. Finally, what are the so-called killer applications? If truth be told, the demand in mobile environments is not really for a new killer app, but rather for new killer ways to access existing applications. These may include (and in some cases already do) Web access, IM, e-mail, collabo- rative gaming, location-based services, personalized event notification, content aggregation, and personal information portals. In 2004 alone, more than 600 million mobile phones were sold. Interestingly, 70 million of them had built-in cameras, adding some credence to the belief that the ability to transmit and receive digital photographs from one cell phone to another device is a desirable application. (Although I have yet to meet anyone who regularly transmits photographs from their cell phone.) Two-thirds of all cell phones shipped today have color screens, and multiple service providers have announced multimedia applications for their mobile users including downloadable games and music clips, as well as a wide variety of customizable ring tones. Don't believe that these are desirable applications? In 2004, mobile games generated $1.1 billion in revenues, while downloadable ring tones generated an almost unbelievable $3.5 billion. Even so, a study performed recently by Bear Stearns-Booz Allen & Hamilton predicted that wireless data services are unlikely to exceed ten percent of carrier revenues by 2007. But here's a question for readers: Should they? 3G's Bottom Line 3G, billed as the ideal mobile data solution, has failed to live up to expec- tations or to satisfy the 