Some users are reporting to have problem with active sync on Palm Treo 700w smartphone when they have accidentally received symbian virus Commwarrior.B via bluetooth.

Report by F-Secure,

When user was trying to sync the Treo 700w with PC the desktop Anti-Virus was giving alerts about SymbOS/Commwarrior.B, and both the telecom and phone vendor support were at loss on figuring out what was going on.

When we started helping customer to figure out what was going on it turned out that the customer really had Commwarrior.B on the phone. However this was SymbOS/Commwarrior.B not a new variant, and it was totally harmless in the device. With the exception of causing PC Anti-Virus alarms at sync.

The phone contained several SIS files with random filenames such as n0g5u00p7.sis, which means that the files were received over bluetooth, as the MMS spreading uses a constant filename commw.sis.

So if you are confused of symbian virus detected in your windows mobile smartphone when you do active syncing, this could be the cause of it.