CAUTION! this method will remove all data on the device including calendar and phone numbers:
Trojan:SymbOS/Romride is a family of trojans that install malfunctioning system configuration components on the device. When the affected device is started, the phone may fail to complete startup.
Different effects may also be seen based on the version of ROM software installed on the device.
Representative examples of variants in the Romride family include:
If the phone has been rebooted and will not start again, it can be recovered with a hard format key code that is entered in the phone at boot.