This firmware is not signed. This means you cannot restore to it in iTunes.
| Release Date | 27 September 2019 |
| Upload Date | 24 September 2019 |
| File Name | iPhone_4.0_64bit_13.1.1_17A854_Restore.ipsw |
| File Size | 3.37 GB |
| SHA256sum | dd269c3cf8158efff25df8eee97ba2ba26bb0d23547ce08395ed303c16695093 |
| MD5sum | a67614ece302750de09ceda9009e689c |
| SHA1sum | 3320cd5ca09a35d9e8408ec2cc2cf25273a35965 |
| Identifier | iPhone8,4 |
cd ~/Downloads.idevicerestore -e iPhone_4.0_64bit_13.1.1_17A854_Restore.ipsw and press Enter.