Apple hopes claims that this firmware update will resolve all the iPhone 4 reception issues. Now, that we know that the press conference later today is related to iPhone 4, we are still left guessing on what Apple has to say.
Below are the download links for the iOS 4.0.1 firmware Download iOS 4.0.1 ipsw for iPhone 4. Download iOS 4.0.1 ipsw for iPhone 3GS. Download iOS 4.0.1 ipsw for iPhone 3G.