For those with factory unlocked iphones and iphones that have been officially unlocked thru AT&T, is there a way to tell if your phone is unlocked besides entering your IMEI through those sites that check? Do you guys have a 'carrier settings' section under your settings menu? I don't have a 3rd party SIM card to test it out. But I performed a factory unlock issued via AT&T. Did the backup, restore, restore from backup and never got that "congratulations your phone has been unlocked" from iTunes. So I'm contemplating whether or not my phone got unlocked successfully? IMEI sites are reporting that my phone is unlocked though.