This firmware is not signed. This means you cannot restore to it in iTunes.
| Release Date | 08 April 2015 |
| Upload Date | 04 April 2015 |
| File Name | iPhone5,4_8.3_12F70_Restore.ipsw |
| File Size | 1.54 GB |
| SHA256sum | 73e559e11482847c8cd606008ff3891a1fc0404f3c58ebfeedd3a3dfd66be5a3 |
| MD5sum | 66697b2e1667ad147af98dd3e85b8b9a |
| SHA1sum | 69b7a549bf172fcfb6ec4b68c85b08835d37eab8 |
| Identifier | iPhone5,4 |
cd ~/Downloads.idevicerestore -e iPhone5,4_8.3_12F70_Restore.ipsw and press Enter.