Mobile phone malware - viruses, worms and Trojan programs created to attack the devices - are 
rare, but starting to appear in Japan and Europe, where 3G technology is more popular, according to Corey Nachreiner, a network security analyst at vendor WatchGuard Technologies.
By the time such malware hits domestic users’ handsets the programs are expected to blend into more complex threats. Some examples recently hitting overseas users include…
* The Doomboot trojan perpetrates denial-of-service attacks by billing itself as "Warez" - premium games that have been compromised to allow free use, says Seth Fogie, VP at mobile security vendor Airscanner. Devices work until they are rebooted. Doomboot enters via Bluetooth’s discovery mode, the Web and e-mail. Techworld.com - How to avoid phone viruses