This firmware is not signed. This means you cannot restore to it in iTunes.
| Release Date | 12 August 2020 |
| Upload Date | 07 August 2020 |
| File Name | iPhone_4.0_64bit_13.6.1_17G80_Restore.ipsw |
| File Size | 3.50 GB |
| SHA256sum | 3ad1f9b0d37ca62c4f85b13a9809bc7046b74a3f98d6e8371f2b05d3668e0263 |
| MD5sum | c99466235b9b55e2b80adfc014d65708 |
| SHA1sum | fcadec2a6902c33224b22c30695746239bceeb2f |
| Identifier | iPhone8,4 |
cd ~/Downloads.idevicerestore -e iPhone_4.0_64bit_13.6.1_17G80_Restore.ipsw and press Enter.