This firmware is not signed. This means you cannot restore to it in iTunes.
| Release Date | 19 September 2017 |
| Upload Date | 02 September 2017 |
| File Name | iPhone_4.0_64bit_11.0_15A372_Restore.ipsw |
| File Size | 2.43 GB |
| SHA256sum | a0c47818d570c304d3c84d1d6548ed19b818d1eeab5d4f61ba2d1d34bc4560b7 |
| MD5sum | 3082ffa4fba2fb95bc17afe15ec361ce |
| SHA1sum | c7c43324096e291a05042f3795983f395369abb5 |
| Identifier | iPhone8,4 |
cd ~/Downloads.idevicerestore -e iPhone_4.0_64bit_11.0_15A372_Restore.ipsw and press Enter.