This firmware is not signed. This means you cannot restore to it in iTunes.
| Release Date | 22 January 2019 |
| Upload Date | 11 January 2019 |
| File Name | iPhone10,3,iPhone10,6_12.1.3_16D39_Restore.ipsw |
| File Size | 3.31 GB |
| SHA256sum | |
| MD5sum | 8aede6573c89a6adde56dc16dacc9a17 |
| SHA1sum | e1d1299ec384a029214380a5c096d7b2fae571f6 |
| Identifier | iPhone10,3 |
cd ~/Downloads.idevicerestore -e iPhone10,3,iPhone10,6_12.1.3_16D39_Restore.ipsw and press Enter.