I have an iPhone 4 that was running iOS 6.1.3. I requested that my provider unlock my phone and they told me I had to back up and restore to proceed, which necessitated that I upgrade to iOS 7.0.2. When I tried to download the iOS 7.0.2 IPSW directly through iTunes, I received a message upon the completion of the download that the file was corrupted. I decided to bypass this step by downloading the IPSW directly from Apple and alt-clicking the Restore button to choose the file directly. Each time, the upgrade hangs about 30% of the way through, leaving me essentially with a bricked phone. Does anyone have any suggestions for how I might be able to successfully restore my phone?