Virus i think my n6630 had a virus, will formatting my n6630 can get rid of that virus? how or what should i do.. thanks for your help

Yep Formatting certainly will get rid of virus ! But if you do not want to lose your contacts or personals datas you can try free antivirus softwares for symbian phones
also tips to format :
Here’s how you can remove, clear and clean the virus from your Nokia cell phone :
1> Remove the memory card from your cell phone and keep it in a clean and safe place. 2> Turn on your cell phone and key in #7370# 3> Security code prompt comes up, if you have set a security key, then key it in, else key in the default security key which is 12345.

This step is actually hard resetting your mobile phone. Which means that you might lose all data if you have not backed it up and moved it on to the memory card. Hence it is very important that you remove the memory card before performing this process.
Chances are that your memory card may also be infected by the virus. To remove the virus from memory card, put it on a card reader, connect it to your PC, either run one of the latest anti-virus software on it or format it if the anti-virus fails to remove the virus (You’ll end up losing the data here), which should clean it up.
Put the memory card back in your cell phone, restart the cell phone, which is now clean of the virus.