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_64bit_TouchID_11.3.1_15E302_Restore.ipsw | 
| File Size | 2.49 GB | 
| SHA256sum | 87d433ab082a12693d6e6b7d0243c997ae203d63b3dc3e06c39a1579e21f4858 | 
| MD5sum | 717d170121e0357f5be49ed6edaf460b | 
| SHA1sum | 0882c7dec9c970c1ede1aa43babdff63f0149eb0 | 
| Identifier | iPad5,3 | 
cd ~/Downloads.idevicerestore -e iPad_64bit_TouchID_11.3.1_15E302_Restore.ipsw and press Enter.