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 | iPad5,4_9.2.1_13D15_Restore.ipsw | 
| File Size | 1.86 GB | 
| SHA256sum | 6114c6dc3fdf5c77d1c3bb1e0cc32e397315c842a3780f94c7e0aff9fdcf8c8c | 
| MD5sum | 7d29a088376b090fef7e4cbd8ddc178d | 
| SHA1sum | 29443fa607d1651e52667cf7409e6bf67911fd71 | 
| Identifier | iPad5,4 | 
cd ~/Downloads.idevicerestore -e iPad5,4_9.2.1_13D15_Restore.ipsw and press Enter.