Nokia 3590 Service Codes; Gives you the secret menu

I recall 51xx Nokia models having a special code I believe was somthing like *3001#12345 that would give you the "secret menu" that allows you to change your NAM selection, for example I'm trying to change where it says "AT&T Wireless" to "MYNAME" without causing it to change the service from AT&T Wireless. Is this even possible with these models? If so, does anyone have the service code? I have yet to find this documented on any of the three mailing lists I have looked through.