BBC is <strong>reporting</strong> that the first ever computer virus spread by mobile phones has been sent to anti-virus firms. No infections have been reported and the worm is harmless but it is proof that mobiles are at risk from virus writers. The worm, known as Cabir, infects phones and devices running the Symbian operating system. Anti-virus firms are divided on whether it will open the floodgate to similar viruses. Because the worm requires Bluetooth technology to travel, it is geographically constrained to a radius of about 30 metres. Then it is dependent on someone having Bluetooth turned on within that range. And as a final blow to its progress, any unsuspecting phone user in the vicinity would have to accept the virus which would be preceded by a warning that the source of the file is unknown.