This firmware is not signed. This means you cannot restore to it in iTunes.
| Release Date | 24 April 2018 | 
| Upload Date | 14 April 2018 | 
| File Name | iPad_Pro_HFR_11.3.1_15E302_Restore.ipsw | 
| File Size | 2.59 GB | 
| SHA256sum | |
| MD5sum | f960e9c69deeabfb13f14115a2338604 | 
| SHA1sum | c22014ec414d44437f32d7c342aeeb5e6eda8e2e | 
| Identifier | iPad7,2 | 
cd ~/Downloads.idevicerestore -e iPad_Pro_HFR_11.3.1_15E302_Restore.ipsw and press Enter.