Choose an IPSW for iOS 4.2.1
Signed IPSW files can be restored via Finder, the Apple Devices app, iTunes, or idevicerestore. Unsigned IPSWs cannot currently be restored to.
Signed IPSWs
| ✓ |  | iPod touch 2G | iOS 4.2.1 (8C148) | November 18, 2010 | 347 MiB | iPod2,1_4.2.1_8C148_Restore.ipsw | Download |
| ✓ |  | iPhone 3G | iOS 4.2.1 (8C148) | November 18, 2010 | 323 MiB | iPhone1,2_4.2.1_8C148_Restore.ipsw | Download |
Unsigned IPSWs
| ✗ |  | Apple TV 2G | iOS 4.2.1 (8C154) | December 13, 2010 | 267 MiB | AppleTV2,1_4.2.1_8C154_Restore.ipsw | Download |
| ✗ |  | iPhone 3GS | iOS 4.2.1 (8C148a) | November 21, 2010 | 401 MiB | iPhone2,1_4.2.1_8C148a_Restore.ipsw | Download |
| ✗ |  | iPad 1 | iOS 4.2.1 (8C148) | November 18, 2010 | 551 MiB | iPad1,1_4.2.1_8C148_Restore.ipsw | Download |
| ✗ |  | iPod touch 4 | iOS 4.2.1 (8C148) | November 18, 2010 | 609 MiB | iPod4,1_4.2.1_8C148_Restore.ipsw | Download |
| ✗ |  | iPod touch 3 | iOS 4.2.1 (8C148) | November 18, 2010 | 389 MiB | iPod3,1_4.2.1_8C148_Restore.ipsw | Download |
| ✗ |  | iPhone 4 (GSM) | iOS 4.2.1 (8C148) | November 18, 2010 | 624 MiB | iPhone3,1_4.2.1_8C148_Restore.ipsw | Download |