This firmware is not signed. This means you cannot restore to it in iTunes.
| Release Date | 25 October 2023 |
| Upload Date | 16 October 2023 |
| File Name | iPhone_4.0_64bit_15.8_19H370_Restore.ipsw |
| File Size | 4.88 GB |
| SHA256sum | 54fa6dc08bb273beef680faace6813cf29d32cb96997864fa53f445e2f5f16bc |
| MD5sum | a08fc7935a50c1f603fc17f199234c22 |
| SHA1sum | c4668a350a94cfbfb43389122fce27df4a747699 |
| Identifier | iPhone8,4 |
cd ~/Downloads.idevicerestore -e iPhone_4.0_64bit_15.8_19H370_Restore.ipsw and press Enter.