How do I unlock a subsidy code on a cell phone?

Have you friend call tmobile and ask them for a unlock code to travel aboard. They will provide you with the code to unlock the Razr and then you will be able to use it with att.

You have to call AT&T and ask them for the subsidy code for your particular SIM card, not T-Mobile.

Is there any way to unlock an t-mobile without connecting to pc? I normally use http://www.mobile-unlocker.com/ to get unlocking instructions for all GSM mobiles but some how they don't seem to have instructions for the t-mobile. Can anyone help me?

yes ,

first u gotta unlock ur phone from T- mobile , the best method i would suggest is by unlock codes, try this site which guides u through the entire process http://www.mobileunlockguide.com/

Your code depends of your phone IMEI (*#06# to know it)

you can ask your unlock code to your provider but this is very expensive

the best way is to unlock your phone on this website http://www.unlock-phone-online.com/ I unlocked my phone there.

The cheapest one can be find here

http://www.motorola.remoteunlockingcode.com/