This firmware is not signed. This means you cannot restore to it in iTunes.
| Release Date | 12 January 2022 | 
| Upload Date | 08 January 2022 | 
| File Name | iPad_64bit_TouchID_15.2.1_19C63_Restore.ipsw | 
| File Size | 4.78 GB | 
| SHA256sum | a0c272535b32fc4fd9785bc0a50833151c2c79fed58b278314f31dbe3d11831b | 
| MD5sum | abee5a156b364ad06fd01cc36b7d64db | 
| SHA1sum | 380c0098eab31d8ef001268d77d4a47f4639798b | 
| Identifier | iPad5,3 | 
cd ~/Downloads.idevicerestore -e iPad_64bit_TouchID_15.2.1_19C63_Restore.ipsw and press Enter.