This firmware is not signed. This means you cannot restore to it in iTunes.
| Release Date | 09 December 2014 |
| Upload Date | 05 December 2014 |
| File Name | iPhone5,4_8.1.2_12B440_Restore.ipsw |
| File Size | 1.50 GB |
| SHA256sum | afd73cdcf0fcfaa67770f71a5321e3b71034800f1746daf3e90eb9d154d1ead8 |
| MD5sum | 2af01513976b109659022e50c9df6994 |
| SHA1sum | 9068f83f6e102cf63ab2265d33314b3fbcf2bc61 |
| Identifier | iPhone5,4 |
cd ~/Downloads.idevicerestore -e iPhone5,4_8.1.2_12B440_Restore.ipsw and press Enter.