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 | iPad_64bit_TouchID_12.1.3_16D39_Restore.ipsw | 
| File Size | 2.79 GB | 
| SHA256sum | |
| MD5sum | aadaac87faa60b13672da22e964768ea | 
| SHA1sum | 07133baf3be1e29494e689b21446ca67efd95707 | 
| Identifier | iPad5,3 | 
cd ~/Downloads.idevicerestore -e iPad_64bit_TouchID_12.1.3_16D39_Restore.ipsw and press Enter.