Signed IPSW files can be restored via iTunes. Unsigned IPSWs cannot currently be restored via iTunes.
✗ | iPhone 2G | iPhoneOS 2.2 (5G77) | 17th November 2008 | 258 MB | iPhone1,1_2.2_5G77_Restore.ipsw |
✗ | iPhone 3G | iPhoneOS 2.2 (5G77) | 17th November 2008 | 258 MB | iPhone1,2_2.2_5G77_Restore.ipsw |
✗ | iPod touch 2G | iPhoneOS 2.2 (5G77a) | 17th November 2008 | 291 MB | iPod2,1_2.2_5G77a_Restore.ipsw |