Call AT&T and have them officially unlock it. It does not take long at all now. I called and within 30 minutes I had restored the phone and it was truly unlocked. Also, I sold the same phone on my local CraigsList for $400 cash, in original box with all accessories, no bargains, in under 24 hours.
2009 BMW E92 M3 | Jet Black / Fox Red, Extended - SOLD | Akrapovic Evolution - SOLD | MS Filter | StopTech ST60 / ST40, yellow | KW CS | 90mm stud conversion | 18x10F 18x10.5R HRE R43, Continental rubber | IND appearance package incl. key delete | JL Audio 10W6v3 (2) / HD700/1, Technic's harness