If default security code 12345 or 1234 or 0000 or 00000 didn't work. You can get master reset code for your nokia 1680 classic. There are many sites available for master reset service. OnlineGsmUnlock.com is one of the trusted site for master reset service...
imam nokiju 1680 classik na mreži tel2 kada stavim novu karticu tražimi sigurosni kod pokušasam sa 12345,1234, 0000, 00000 ne prihvaća marko molim pomoć hvala