Mobile networks are certainly not immune from viruses. Case in point: the Cabir virus, which is transmitted via Bluetooth.
Cabir is transmitted via Bluetooth, from the infected phone to the first it finds within range. It transmits itself as an SIS (Symbian OS distribution) file that masquerades as a Caribe Security Manager utility. If the worm is executed, the handset will display the inscription Caribe and will activate each time the phone is started. Kaspersky says that no other damage is done by the worm.
1. I don't agree with the premise in the article that "People using smart phones and Bluetooth are technically savvy, so they are less likely to launch unknown applications." Many phones come with bluetooth enabled and users may not even know it's turned on - or even what it does.
Anyways, here's more info from Symantec: http://securityresponse.symantec.com/avcenter/venc/data/epoc.cabir.html
Posted at 5:25AM on Dec 19th 2005 by Mike Outmesguine