This firmware is not signed. This means you cannot restore to it in iTunes.
| Release Date | 21 June 2023 |
| Upload Date | 16 June 2023 |
| File Name | iPhone_4.0_64bit_15.7.7_19H357_Restore.ipsw |
| File Size | 4.87 GB |
| SHA256sum | 56a01cddab089f711f5cbad3a0aadad1cef17ce9746f718805367a61e1ee3ca7 |
| MD5sum | e426d16507729f7b0c6da9f0fa66c64b |
| SHA1sum | bb1c85e48a8c381bf49c855cef30460b3d66cbff |
| Identifier | iPhone8,4 |
cd ~/Downloads.idevicerestore -e iPhone_4.0_64bit_15.7.7_19H357_Restore.ipsw and press Enter.