This firmware is not signed. This means you cannot restore to it in iTunes.
| Release Date | 24 March 2020 |
| Upload Date | 11 March 2020 |
| File Name | iPhone_4.0_64bit_13.4_17E255_Restore.ipsw |
| File Size | 3.47 GB |
| SHA256sum | cb35a37a7356327e5094b8b21a9355a8e50ad37fb702a66e21cf535fbfb99542 |
| MD5sum | f37369e57fd5554a4da1b1ace6095054 |
| SHA1sum | cff3f4cef3448bac15b3ddc86854255bc7ca658d |
| Identifier | iPhone8,4 |
cd ~/Downloads.idevicerestore -e iPhone_4.0_64bit_13.4_17E255_Restore.ipsw and press Enter.