This firmware is not signed. This means you cannot restore to it in iTunes.
| Release Date | Invalid Date |
| Upload Date | 13 March 2013 |
| File Name | AppleTV3,1_5.2.1_10B329a_Restore.ipsw |
| File Size | 0.61 GB |
| SHA256sum | 42ade16b564d61bdcdefdccd0aab6a441c3d501447376ef42b71cd9bcf4c0d72 |
| MD5sum | cc82e5da0a5e43c7e24883a6e3b34621 |
| SHA1sum | f74c3c5ce0ac21a5320cb491b32e51b400877196 |
| Identifier | AppleTV3,1 |
cd ~/Downloads.idevicerestore -e AppleTV3,1_5.2.1_10B329a_Restore.ipsw and press Enter.