You can put videos, games, pictures and music on your cell phone. Is antivirus software next? Programs that fight viruses have become a necessary evil on Windows PCs. Now the antivirus industry is <A HREF="http://news.zdnet.com/2100-1009_22-6042745.html?tag=zdnn.alert">turning its attention to mobile phones</A>--but it's running into reluctance from cell service providers, who aren't so sure that the handset is the best place to handle security. Verizon Wireless, one of the top U.S. mobile networks, doesn't see a need for its customers to install antivirus software on cell phones. "At this point, that is absolutely not required by individual customers," spokesman Jeffrey Nelson said.