you can get the correct and accurate unlock code for your Nokia 6021 phone from http://www.simpleunlocking.com/nokia-6021/rs16wp9/ here you need to specify your country,Network name to which it is locked,IMEI number of your phone.Then they deliver unlock code to you through mail with unlocking instructions.By using unlocking instructions this you can unlock your phone easily.
sahana
September 2013