Unlocking falls into the category of cracking/hacking and is not allowed on these forums for more reasons than one.
To start with, if the phone happens to be on a contract and you so choose to unlock it; you are committing breach of a legally binding document by doing so.
If the phone is not on a contract, but happens to be running a custom version of an Android ROM such as the ones T-Mobile frequently puts on their devices, unlocking it yourself falls into the category of copyright infringement as you are modifying copyrighted software. Same goes for Apple software and the iPhone.
Furthermore, we can not prove the device ownership, and will not help commit theft. "
Hello there Tom's Guide Members! We get a lot of requests to help people find/track phones, unlocking them, and recovering data that we felt a sticky thread was needed on the subject. Why Can't The Forums Find My Phone? The short answer is that we just don't have the capabilities to do so...