Anyone know how to undo the carrier lock on a Nokia phone?

[codeyf]

Specifically, a Nokia 3360. It's locked for Cingular, but I need it to work on ATT. Yes, I work at ATT, but our prices for phones are crap, so I went the eGay route.

With all the technical knowledge possesed by AT's users, someone has got to know!!!

 

[mrCide]

i paid 10 bucks to unlock my at&t 8260 to cingular.. but i dunno how he did it and he's not around anymore