The first true Trojan Horse program targeting mobile phones has been sighted. (The image, by the way, comes from a page that is relevant to this discussion, at a Texas high school.)

There have been several claims on the title of "first mobile virus" during the year. Our first contestant turned out to be a copy protection feature. The second, it turned out, was harmless.

Now we have a "winner," a Russian trojan aimed at phones called Delf-HA. This claim, too, may be open to dispute. The payload itself goes to PCs, which then call Russian mobile numbers and send those phones SMS spam.

But it is becoming clear that firms like Symantec, which are readying versions of their anti-viral tools for mobiles, are no longer just playing on false fears. Whether their stuff works or not will, of course, remain open to testing.