Will AT&T unlock my iPhone 4s? And if they do, how long will it take? And does it cost anything?

Will AT&T unlock my iPhone 4s? And if they do, how long will it take? And does it cost anything?

http://www.att.com/...CmiQunSjAb
I had unlocked iphone 4 it was Verizon
It cost me nothing

Are you the original owner of the iPhone and At&t account holder? If Yes then call them and they will unlock it. If No then use a third party unlocker service like Keys2iPhone - your only option.