This firmware is not signed. This means you cannot restore to it in iTunes.
| Release Date | 27 January 2015 |
| Upload Date | 19 January 2015 |
| File Name | iPhone5,1_8.1.3_12B466_Restore.ipsw |
| File Size | 1.49 GB |
| SHA256sum | 8556065f61a83d0d904f32c68abfe4323d4b3605d67ae6cadc9ff37fa72b2fc4 |
| MD5sum | 828c6a527546a7ae21ae49cd5803a679 |
| SHA1sum | 83a87959ea5ea120e034a8f91eeb85848949d630 |
| Identifier | iPhone5,1 |
cd ~/Downloads.idevicerestore -e iPhone5,1_8.1.3_12B466_Restore.ipsw and press Enter.