http://www.symantec.com/avcenter/venc/data/symbos.commwarrior.a.html
Removal using the Symantec Mobile Threats Removal Tool
Symantec Security Response has developed a removal tool to clean
the infections of SymbOS.Commwarrior.A. Use this removal tool
first, as it is the easiest way to remove this threat.
Manual Removal:
To remove SymbOS.Commwarrior.A:
1. Install a file manager program on the phone.
2. Enable the option to view the files in the system
directory.
3. Search the drives, A through Y, for the \system\apps\commwarrior
directory.
4. Delete the files commwarrior.exe and commrec.mdl.
5. Go to the \system\updates\commwarrior directory.
6. Delete the files commwarrior.exe, commrec.mdl, and
commw.sis.
7. Go to the \system\recogs directory.
8. Delete the file commrec.mdl.
and my friends laughed at me for suggesting investing in an
anti-virus software for symbian. 
