Now here is a really bad piece of news for owners of Symbian Series 60 - a Trojan has been created that can render an infected device unusable. Beware the Fontal-A Trojan, which can install a corrupted font file on the device, causing it to fail when the mobile phone is next rebooted.

Fontal-A is a Trojan, incapable of spreading by itself or via Bluetooth. The small risk of infection applies only to people in the habit of installing warez mobile games files or the like onto their mobile phone.

The Trojan also does other damage to the system, including damaging the application manager so that it cannot be uninstalled. It is not until a disinfection of the phone has taken place that the device will be able to have new applications installed.