Download iOS 4.0.1

iOS 4.0.1 (3G): http://appldnld.apple.com/iPhone4/061-8616.20100715.phnt4/iPhone1,2_4.0.1_8A306_Restore.ipsw
iOS 4.0.1 (3GS): http://appldnld.apple.com/iPhone4/061-8618.20100715.Zapn4/iPhone2,1_4.0.1_8A306_Restore.ipsw
iOS 4.0.1 (4): http://appldnld.apple.com/iPhone4/061-8619.20100715.4Pnsx/iPhone3,1_4.0.1_8A306_Restore.ipsw