3. Click on the desired firmware version to start the download Downloads Links for iPhone 3G iPhone1,2 VERSION RELEASE DATE RELEASE DATE SIZE SIZE STATUS iOS 4.2.1 (8C148) RELEASE DATE 18/11/2010 SIZE 339 MB Signed iOS 4.1 (8B117) RELEASE DATE 03/09/2010 SIZE 323 MB Signed iOS 4.0.2 (8A400) RELEASE DATE 09/08/2010 SIZE 320 MB Unigned Old unsigned iOS versions will be added later.