OTA firmwares cannot be restored to. IPSW Downloads collects them for potential future use. They might also be useful if you're doing research.
| ✗ | Apple TV 4 (2015) | tvOS 10.2.1 (14W6585) | May 4, 2017 | 1000 MiB | 3f709c53ad2387abef8d1c371ee828aca3d3b1e1.zip |
| ✗ | Apple TV 4 (2015) | tvOS 10.2.1 (14W585) | May 4, 2017 | 1000 MiB | 3f709c53ad2387abef8d1c371ee828aca3d3b1e1.zip |
| ✗ | Apple TV 4 (2015) | tvOS 10.2.1 (14W5583a) | April 24, 2017 | 999 MiB | bccc93b92824b55b38518b5c579824d705a074d4.zip |
| ✗ | Apple TV 4 (2015) | tvOS 10.2.1 (14W5578b) | April 17, 2017 | 999 MiB | 8ccb47761da1870e05b25dc31b67fd64b791a064.zip |
| ✗ | Apple TV 4 (2015) | tvOS 10.2.1 (14W5573a) | April 10, 2017 | 998 MiB | 12b7f26fc522d398a3e96929ed85962f70b5b1dc.zip |
| ✗ | Apple TV 4 (2015) | tvOS 10.2.1 (14W5563b) | March 28, 2017 | 998 MiB | 9b726dfe9f5b56452ba43f38ab434b7ab2232539.zip |