I am a registered developer with a registered iPhone 5 A1428 UDID. Whenever I try to upgrade to iOS 7 beta iTunes gives me a message that says: "The iPhone could not be restored. This device is not eligible for the requested build." I am using an iPhone 5 A1428 and iTunes 11.0.4 with the proper iOS 7 A1428 ipsw file. When trying to upgrade to iOS 7, iTunes fully extracts the IPSW, but the error occurs when "Verifying update with Apple". I do not understand the cause of this technical issue. Is anyone else having this problem and know how to resolve it?