Unlock Iphone 4 (6.0.1) to Tmobile?

So my brother gave me his old Iphone 4 with 6.0.1 ios and it's locked to AT&T, I already paid $25 to www.iphone-unlocker-pro.com/ to try to unlock it, total scam. I've tried using redsn0w and sn0wbreeze. I have cydia installed, but it won't open on the phone… Can someone please help? My old phone doesn't even type anymore and I'm dieing to finally get this switched over.

I put in info to AT&T to unlock the phone, but it takes 5-7 business days.

We provide an AT&T Official, Permanent, Apple unlock USA ONLY that remove any network restrictions your iPhone may have by marking your handset as unlocked in Apple's IMEI database. It allows you to use your handset on any network worldwide. We provide this unlock for all iPhone models running all firmware versions, and there's no need to jailbreak.
Once you receive your email to confirm that your handset is unlocked, for the iPhone simply connect it to iTunes which will complete the unlock.http://attiphoneunlocker.com/

There's a possibility the code will be returned as NOT FOUND and its not in our control. If that happens you will be REFUNDED.
http://attiphoneunlocker.com/faq/

You can Factory Unlock Your At&t iPhone 4 to use with T-Mobile.

Go to iPhoneUnlockedCheap.com, they can factory unlock it in 1-24 hr (usually 6hr avg). 100% money back guarantee - All ATT locked iphones all models. Check out their reviews

I think this will help you
http://unlockappledevices.com