Anyone know how to Unlock iPhone 4 iOS 6.1

Hello evetyone
Would like to start out thanking everyone for their hard work making this such a great site.
My Main question has anyone found a way to [size=24]unlock iPhone 4 on iOS 6.1
I have looked everywhere for hours on the web and the only thing I come up with is the Gevey sim card unlock
I’m just trying to unlock an AT&T iphone 4 to use with a Tmobile prepaid sim card
Anyone had any luck
Any info helps.
Thank you in advance!![/size]
Answer #1
http://www.google.com?t=2802051&highlight=
Answer #2
www.factorycrack.com they do factory unlock, they did mines in 12 mins
Answer #3
http://www.greenpois0n.us/search/label/Evasi0n