Yes Its Because of CommWarrior.A
It's a one hell of a program. Tested by myself...
It drains your battery, and it drains your account
The Better Way to delete is use fexplorer,seleq etc to delete these virus files if u u dont want to format
The virus drops these files:
X\system\apps\CommWarrior\commwarrior.exe
X\system\apps\CommWarrior\commrec.mdl
X\system\updates\commrec.mdl
X\system\updates\commwarrior.exe
X\system\updates\commw.sis
X is the drive "C" ur phone memory or Ur card "E" ur card memory Drive
check both the drives,if u dont know where u had installed this
This is better thn formatting and loosing data,i personally tried many viruses on my nokia 3230,to see their effect!!
Hope this will help you!!