Try DFU Mode Restore, here are the steps. Open iTunes on computer. Connect iPhone to computer with USB cable. Hold both Home and Power buttons, after exactly 10 seconds release the Power Button, keep holding the Home button until iTunes recognizes iPhone in Recovery Mode, usually about 20 seconds time. If the iPhone screen is black, blank this is DFU Mode. Click the Restore button of iTunes. DFU Mode can be difficult to enter sometimes, just keep trying. DFU Mode is a black, blank screen with iTunes saying Recovery Mode. If still problem and there is Warranty or AppleCare make Genius reservation and take to Apple for resolution.
I tried to unlock legally my iphone following vodafone australia instructions
and the iphone froze and itunes doesnt recognize the device
all I see on iphone is the Itunes logo with the usb cable and I am following these instructions above and I cant make it...any suggestions besides going to a genius appointment?