i need help, i have done my research and im trying to unlock my iphone 1gen or 2gen. not sure wich one it is but its a 16gb and had the silver cover with mid half black..

i update it to the newest version and i wanted to know how to unlock it without having to downgrade the version cause right know it has 3.1.3 and i cant download apps or nothing..

any help would be good, thank you