This firmware is not signed. This means you cannot restore to it in iTunes.
| Release Date | 28 January 2020 | 
| Upload Date | 22 January 2020 | 
| File Name | iPad_Pro_HFR_13.3.1_17D50_Restore.ipsw | 
| File Size | 3.66 GB | 
| SHA256sum | 9c92409a6a6754a60086e2de0180d692c28cfe874f731f2cbdcda3d70eecb636 | 
| MD5sum | 4a0957273ada587e7437e26f5b62814a | 
| SHA1sum | 46f327e907ed2df845af35beff0594952bfa8e94 | 
| Identifier | iPad7,2 | 
cd ~/Downloads.idevicerestore -e iPad_Pro_HFR_13.3.1_17D50_Restore.ipsw and press Enter.