This firmware is not signed. This means you cannot restore to it in iTunes.
| Release Date | 27 March 2017 |
| Upload Date | 20 March 2017 |
| File Name | iPhone_4.0_32bit_10.3_14E277_Restore.ipsw |
| File Size | 1.83 GB |
| SHA256sum | f99a03ce7bfaf6c68576e055ff7fb74230a0312d80ce5c2cd2083118f51ff1f8 |
| MD5sum | 693056c05b603a7cd2f055d226e063d3 |
| SHA1sum | 6db83d41c35c3068d54e8dfdeb598bc4510ac1f4 |
| Identifier | iPhone5,1 |
cd ~/Downloads.idevicerestore -e iPhone_4.0_32bit_10.3_14E277_Restore.ipsw and press Enter.