Hi,
Any one had try any free antivirus program for your symbian phone. I got to know one from Trend Micro and is free through below dowload
http://www.trendmicro.com/download/product.asp?productid=54&show=pcc
Although symbian phone nokia 7610 is in their compatible list. But, i can't install on my phone. During the installation wizard, it said it is not compatible with my phone. For your information my 7610 is powered with symbian OS 7 and firmware version is v 5.0509.0ch 01-03-05 RH-51. Pls comment on your experience if any. TQ