Hey, I wanted to unlock my blackberry pearl which was locked to T-Mobile so I could use it on a different service, but didn't want to pay a site to do it.
So, I emailed T-Mobile to try and find a way to give me an unlock code, and they listed several criteria. I noticed none said I had to be the owner of the phone, just a t-mobile customer for 90 days.
I then asked a friend of mine who had been with t-mo for a while, and had him request an unlock code from T-Mobile via IMEI number, and it worked flawlessly. Totally free.
So, find a friend with t-mo and get the unlock code easily