cell phone ringers The software works with phones from AT&T Wireless, Sprint, T-Mobile, and Cingular. Of course, this cuts the carriers out of the revenue stream. And as more users become more sophisticated about it, they'll simply rip their own songs and then transfer them without paying anyone any extra money. So the question is, what's the next wireless fad and rainmaker?. To date, location-based services haven't become a reality and there are plenty of concerns about how consumers will react to them. Games are being pushed (and how), but Monkey Ball notwithstanding, they haven't gotten any traction yet. Clearly camera phones are a hit, driving up handset sales and traffic.