This firmware is not signed. This means you cannot restore to it in iTunes.
| Release Date | Invalid Date |
| Upload Date | 18 November 2010 |
| File Name | iPod3,1_4.2.1_8C148_Restore.ipsw |
| File Size | 0.38 GB |
| SHA256sum | 9b44986e5df685278d940069af924f11fcf247b2af7e20b34d2ab607efddb0dc |
| MD5sum | 25dbf5b3e5ca39edd0aab8fcab888503 |
| SHA1sum | 1127a042c535f7cf0be950ff8946862d5fb05b36 |
| Identifier | iPod3,1 |
cd ~/Downloads.idevicerestore -e iPod3,1_4.2.1_8C148_Restore.ipsw and press Enter.