6280 is a BB5 Nokia which means you will need to try and get your code from the original service provider, but will cost. There is no other way (at this time) to unlock it.
Pazzini is probably right, but you can try; my buddie, who has a couple of websites, one being on ebay ( huge selection ), the other, which is http://www.karmaphones.com . Now he, in turn has a partner who is an Expert in unlocking phones, Specializing in Nokia. You can get Daves number ( Owner of Karma Phones ), from his website above. Tell him Bryan sent ya. **Though that might make him hang up on ya.....