I have a jailbroken iPhone 4 w/ iOS 4.3.1 and I'm trying to restore it back to stock 4.3.1 so that I can give it to somebody who wants to unlock it. I plug the phone into iTunes 10.5.1.42 and then I hold the shift key when I click Restore and then I choose the iPhone3,1_4.3.1_8G4_Restore.ipsw file. iTunes will unpack the file and then it gets to the Verifying with Apple Servers step and I get the following error: "The iPhone "iPhone" could not be restored. An unknown error occurred (3194)." Anybody know what I'm doing wrong?