This firmware is not signed. This means you cannot restore to it in iTunes.
| Release Date | 08 November 2023 |
| Upload Date | 03 November 2023 |
| File Name | iPhone13,1_17.1.1_21B91_Restore.ipsw |
| File Size | 7.16 GB |
| SHA256sum | ee0c902bb0f09d148a1907812509f10f94c4d1868bc9ba9f0eab974173568634 |
| MD5sum | 7d759ae76efe1017b7b217619037499c |
| SHA1sum | cf32dc1bc51a44137b85d5a02da851b5bd15e9a3 |
| Identifier | iPhone13,1 |
cd ~/Downloads.idevicerestore -e iPhone13,1_17.1.1_21B91_Restore.ipsw and press Enter.