New Trojan horses threaten cell phones.

"Three new malicious programs are hitting certain mobile phones, anti-virus companies have warned. The Trojan horses, or programs that are disguised as legitimate applications, spread via Bluetooth or multimedia messages and can affect phones running the Symbian operating system... Symantec and F-Secure both admit that these Trojans are unlikely to spread very widely... Unlike worms on computers that spread without users knowing, the Trojan horses hitting cell phones spread as attachments that require users to download them."