This firmware is not signed. This means you cannot restore to it in iTunes.
| Release Date | 19 January 2016 | 
| Upload Date | 12 January 2016 | 
| File Name | iPad5,3_9.2.1_13D15_Restore.ipsw | 
| File Size | 1.81 GB | 
| SHA256sum | 040d3fdc51ef334a45d6e7df7a2642022754b83f7a1158d72744eb61053ccc34 | 
| MD5sum | 770f37c77963afc95b97efbabb90d130 | 
| SHA1sum | f2b0101d69d93d7c3d5e9b6028d1a8599d3a3a98 | 
| Identifier | iPad5,3 | 
cd ~/Downloads.idevicerestore -e iPad5,3_9.2.1_13D15_Restore.ipsw and press Enter.