OTA firmwares cannot be restored to. IPSW Downloads collects them for potential future use. They might also be useful if you're doing research.
| ✗ | HomePod mini | audioOS 9.9.15.2 (19K52) | December 13, 2021 | 1.9 GiB | dae49eb683740891a4819ffd12db19cc7ebe26f2.zip |
| ✗ | HomePod mini | audioOS 9.9.15.2 (19K6052) | December 13, 2021 | 1.9 GiB | dae49eb683740891a4819ffd12db19cc7ebe26f2.zip |
| ✗ | HomePod (Unknown Model) | audioOS 9.9.15.2 (19K52) | December 13, 2021 | 1.9 GiB | e21fabbe21238ec0bfe9bfb8a536eada01a67a3a.zip |
| ✗ | HomePod (Unknown Model) | audioOS 9.9.15.2 (19K6052) | December 13, 2021 | 1.9 GiB | e21fabbe21238ec0bfe9bfb8a536eada01a67a3a.zip |
| ✗ | HomePod | audioOS 9.9.15.2 (19K52) | December 13, 2021 | 1.9 GiB | e21fabbe21238ec0bfe9bfb8a536eada01a67a3a.zip |
| ✗ | HomePod | audioOS 9.9.15.2 (19K6052) | December 13, 2021 | 1.9 GiB | e21fabbe21238ec0bfe9bfb8a536eada01a67a3a.zip |