I am having a problem unlocking.

I used various codes and it just says insert sim card when entering the appropriate codes.

The codes from the free nokia site all but number 7 enter just fine and state insert sim code while #7 give a code error.

Being a noob I am certain I did just about everything wrong at some point today. But have yet to see a restrictions removed message or a message indicating I have hard locked the phone.

Any help would be awesome. Please.