This firmware is not signed. This means you cannot restore to it in iTunes.
| Release Date | 22 July 2019 |
| Upload Date | 15 July 2019 |
| File Name | iPhone_4.0_64bit_12.4_16G77_Restore.ipsw |
| File Size | 2.91 GB |
| SHA256sum | 88e0fb4455bd8ade72df41d34748ea5f65a1fa5beb1ea447292d6988c9f8aaed |
| MD5sum | 318c8d1fb95664445d95035cef0ee2cd |
| SHA1sum | f4a7f01a84d8fbd9871538e09a1ba6c2a5082948 |
| Identifier | iPhone6,2 |
cd ~/Downloads.idevicerestore -e iPhone_4.0_64bit_12.4_16G77_Restore.ipsw and press Enter.