I have recently bought nokia 6680 from my friend. And I have asked him to give me the lock code but he told me that he forgot it, how can I reset this code or find it.


thank you

If your friend hasn't changed it, it is 12345.

If your friend has changed it, your nearest Nokia service/repair center can help: http://www.nokia.com/repair

I dont know from where is manufactured my phone.

Well, as u told "Nokia 6680" then the manufacture is Nokia:http://www.nokia.com.
U need to go to nearest NSC (Nokia Service Centre). If can't find it, as N/A said:http://www.nokia.com/repair to find it. 3rd party service center will not capable to repair ur phone because of ur phone is a member of BB5 phone and no s/w has made for BB5 to reset that security code. Only Nokia has.