* As mobile phones become more like handheld computers, so computer virus writers have them in their sights. The latest mobile malware (which includes nasty software like worms, viruses and Trojan horses) includes Commwarrior, a worm that uses multimedia messaging (such as text, audio or graphics files) to jump from phone to phone. If Commwarrior is downloaded, it hijacks the phone's contact book and sends itself off to other handsets.
Fontal.A is a trojan that installs a corrupted font file on to a phone while masquerading as legitimate software. When the phone is switched off and then switched on again, it freezes. Both pieces of malware attack Symbian Series 60 phones and the Symbian group says it is working with the PC and anti-virus industries to make it harder to attack mobile phones.