okay...
you sure is not the PUK #? is usually on the envelope the sim or contract came in...
( security feature... enabled it by accident a while ago and locked my SIM off the network like a bake...),
cuz methinks if is the SIM unlock code, thas something you only put in once to unlock the phone off the network it was originally locked to...
or it could be the security access code that you personally change.. default is 12345...
if is the PUK , she hadda call tstt and they will give it to her, provided she identifies herself correctly.. good luck with that, and all the crowds
if she needs to unlock the phone, you could try
http://gatt.carigamers.com/index.php/topic,6953.0.html or google up some forums/ unlock code generators
if is the security access code, i dunno.. might hadda carry the fone to flash?