Thank you for your post and welcome to the forums!
There is absolutely no way your phone could get infected by a virus, like farby already mentioned. This is because you can only install Java applications on your phone. Java applications are run in a "sandbox" mode, which means that they have no access to the phone operating system and thus cannot run in the background unnoticed (as viruses tend to do).
If you want to read more about this topic or have any doubts, please see this thread.
Let us know if this helps!
Likwise,i do need antivirus 4 my phone and i hav tried all i could to get it bt all in vain,pls i really need it this week!
You do not need antivirus!!! Read the other posts above.