This firmware is not signed. This means you cannot restore to it in iTunes.
| Release Date | 12 January 2022 |
| Upload Date | 08 January 2022 |
| File Name | iPhone12,8_15.2.1_19C63_Restore.ipsw |
| File Size | 5.78 GB |
| SHA256sum | 6588846b461dd8f729c6c70a8e24c91ca6cef72032dddcdef140b5ffa672c099 |
| MD5sum | a1c60ee7933655a126685f5050949ab4 |
| SHA1sum | 08eba11d0a87b0808586a4f9517d26451be50082 |
| Identifier | iPhone12,8 |
cd ~/Downloads.idevicerestore -e iPhone12,8_15.2.1_19C63_Restore.ipsw and press Enter.