The phone itself is unlocked, but my security code (or the default, for that matter) isn't working. I bought it through T-Mobile USA; the IMEI is 35937... EDIT: IMEI removed.
If your IMEI is correct go here: http://unlocknokia.byyourcommand.net/viewforum.php?f=34&sid=4c889e9cecadfc40f1db40104db5350a
I understand that it's the right code. I found the generator site, and that's the same one it gave me. I'll try that other site.
Something is definitely up with this phone; they couldn't get it to go either. I'll keep looking for other solutions.