Pretty good tutorial. I have done this before also.
What exactly would this do? I've never owned a BlackBerry.
There are many ways available to unlock phone but the best and the safe way to unlock a phone is through codes. Even in getting codes too there are many providers who offer you free services. But free codes doesn't support for some models so its better to get codes from paid services to unlock your phone. i got my blackberry curve phone unlocked through
Theunlockspot.com