This firmware is not signed. This means you cannot restore to it in iTunes.
| Release Date | 27 March 2023 |
| Upload Date | 16 March 2023 |
| File Name | iPhone_4.7_15.7.4_19H321_Restore.ipsw |
| File Size | 4.91 GB |
| SHA256sum | 5594c296e26d63501fa75137679451fcbd2bd350c6195d9c5ce2ac15bb1a6025 |
| MD5sum | b15f0f91528cbe4e10a82ea453294db4 |
| SHA1sum | a95b7e49dea3327d87055e1b0e43d1ede1956b1e |
| Identifier | iPhone8,1 |
cd ~/Downloads.idevicerestore -e iPhone_4.7_15.7.4_19H321_Restore.ipsw and press Enter.