This firmware is not signed. This means you cannot restore to it in iTunes.
| Release Date | 15 October 2019 |
| Upload Date | 10 October 2019 |
| File Name | iPhone_5.5_P3_13.1.3_17A878_Restore.ipsw |
| File Size | 3.84 GB |
| SHA256sum | 35c2fcddc3e41e1339a5a5b6954df704a05e3e614fd71f7ad31365f71ec8bec2 |
| MD5sum | e730a152e5b44d9975566cfab3d95e4d |
| SHA1sum | 278c6eaca8b950dd97d686b98bf6d15b96be3974 |
| Identifier | iPhone10,5 |
cd ~/Downloads.idevicerestore -e iPhone_5.5_P3_13.1.3_17A878_Restore.ipsw and press Enter.