what is the unlock code for a cingular razor cell phone........?

ok i know there is a way to find out the cingular razor cell phone so i can get my tmobile sim card to work in it ii know theres a way if u got any info or know the code then plz tell me
the subsidy code is what im tALKING ABOUT AND KNOW IT SAYS CONTACT SERVICE PROVIDER INSTEAD OF ASKING FOR THE SUBSIDY CODE WHAT SHOULD I DO I USE TMOBILE KNOW AND GOT CINGULAR RAZOR