Mobile virus? My phone book has been changed, and I can no longer find many of the messy text messages I sent and received after reading them. Does anyone know?

You seem to have been infected by an SMS worm. This virus is very powerful. It can search/recover mobile phone text messages and contacts, change and delete contacts and text messages, and also perform data processing on the phone's CPU. The attack paralyzed the mobile phone's CPU. The solution is to flash the machine as soon as possible. Completely remove viruses.