This firmware is not signed. This means you cannot restore to it in iTunes.
| Release Date | 10 February 2022 |
| Upload Date | 07 February 2022 |
| File Name | iPhone11,8,iPhone12,1_15.3.1_19D52_Restore.ipsw |
| File Size | 6.50 GB |
| SHA256sum | cd351c6bfe9fa2b982d832c6aefebc2efc43db4c3bb9743c53a004b3c0b494e7 |
| MD5sum | f4d564c92605f6875029902256c3f0d4 |
| SHA1sum | 2eb9be02c82b5f60d37c83e78e85255b07de279e |
| Identifier | iPhone12,1 |
cd ~/Downloads.idevicerestore -e iPhone11,8,iPhone12,1_15.3.1_19D52_Restore.ipsw and press Enter.