I bought a used Audiovox 8610 on eBay.I had it activated in my name,with my own V-key with Virgin Mobile.But the phone has a 4 digit security code on it and if I accidentally lock the pad I won't be able to use it.How can I figure out the code or erase the current one.Anyone know how many possible different combination of numbers there are in 4 digits?

Dude, a LOT of different combinations. Try going to audivox's website and asking them

Try using the last four digits of the phone number. That is generally the standard lock code, unless you change it. Good luck.