This firmware is not signed. This means you cannot restore to it in iTunes.
| Release Date | 24 September 2019 |
| Upload Date | 17 September 2019 |
| File Name | iPhone_4.7_13.1_17A844_Restore.ipsw |
| File Size | 3.40 GB |
| SHA256sum | 12c29181e894c6c443d9bac047aa44d17033ef55f954c0d4caba8a4bf56e5f9d |
| MD5sum | a8cc4f157d799b1776028c7ce305ddf2 |
| SHA1sum | 3421b3825922e4f3d32e890a75b8ad3ba69a69f2 |
| Identifier | iPhone8,1 |
cd ~/Downloads.idevicerestore -e iPhone_4.7_13.1_17A844_Restore.ipsw and press Enter.