Signed IPSW files can be restored via iTunes. Unsigned IPSWs cannot currently be restored via iTunes.
| ✓ | iOS 4.2.1 (8C148) | 18th November 2010 | 364 MB | iPod2,1_4.2.1_8C148_Restore.ipsw |
| ✓ | iOS 4.1 (8B117) | 3rd September 2010 | 348 MB | iPod2,1_4.1_8B117_Restore.ipsw |
| ✗ | iOS 4.0.2 (8A400) | 9th August 2010 | 344 MB | iPod2,1_4.0.2_8A400_Restore.ipsw |
| ✗ | iOS 4.0 (8A293) | 17th June 2010 | 330 MB | iPod2,1_4.0_8A293_Restore.ipsw |
| ✗ | iPhoneOS 2.2.1 (5H11a) | 22nd January 2009 | 291 MB | iPod2,1_2.2.1_5H11a_Restore.ipsw |
| ✗ | iPhoneOS 2.2 (5G77a) | 17th November 2008 | 291 MB | iPod2,1_2.2_5G77a_Restore.ipsw |
| ✗ | iPhoneOS 2.1.1 (5F138) | 5th September 2008 | 282 MB | iPod2,1_2.1.1_5F138_Restore.ipsw |