This firmware is not signed. This means you cannot restore to it in iTunes.
| Release Date | 25 October 2021 |
| Upload Date | 15 October 2021 |
| File Name | iPhone12,8_15.1_19B74_Restore.ipsw |
| File Size | 5.76 GB |
| SHA256sum | 14396c9e5ff6f95264645270676211ae1e9f1a615b6a81e3fd55ea3e7e8c80e7 |
| MD5sum | 60f363c9bf6c551d60243d6c3971471c |
| SHA1sum | 4ede7888eb26c40f6b73994399bef3be35af3b38 |
| Identifier | iPhone12,8 |
cd ~/Downloads.idevicerestore -e iPhone12,8_15.1_19B74_Restore.ipsw and press Enter.