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 | iPad_Pro_HFR_12.3.1_16F203_Restore.ipsw | 
| File Size | 3.06 GB | 
| SHA256sum | e5508386fc0f2c5aa86d00c2fd124d2427d595defbf6a47d3b2a434ed4eb4897 | 
| MD5sum | e2a86655a22b18951dde360cde64a260 | 
| SHA1sum | 5ba0645466683676f49cc198624ff2c7b77a96bf | 
| Identifier | iPad7,2 | 
cd ~/Downloads.idevicerestore -e iPad_Pro_HFR_12.3.1_16F203_Restore.ipsw and press Enter.