This firmware is not signed. This means you cannot restore to it in iTunes.
| Release Date | 24 May 2019 |
| Upload Date | 22 May 2019 |
| File Name | iPhone_5.5_12.3.1_16F203_Restore.ipsw |
| File Size | 3.11 GB |
| SHA256sum | 68ad422f97a94da2fecfe4c0b0773cfeab3c3515375c08f23a3f98bf64104345 |
| MD5sum | 84a83ab5e05e2560fd6b08d6c014cd82 |
| SHA1sum | a168b1bc901fb64cf725ab0dcca183dd684770dc |
| Identifier | iPhone7,1 |
cd ~/Downloads.idevicerestore -e iPhone_5.5_12.3.1_16F203_Restore.ipsw and press Enter.