This firmware is not signed. This means you cannot restore to it in iTunes.
| Release Date | 24 October 2016 |
| Upload Date | 15 October 2016 |
| File Name | iPhone_4.0_64bit_10.1_14B72_Restore.ipsw |
| File Size | 2.15 GB |
| SHA256sum | d087eb17d32525e1da5d2ea58cda7b9a807e440dd1ccc958b5b131905a969104 |
| MD5sum | 922d75077622972b929705e9be89dded |
| SHA1sum | 16c5da1dcb1b367e3684e64964aed33d0eb5f01c |
| Identifier | iPhone6,1 |
cd ~/Downloads.idevicerestore -e iPhone_4.0_64bit_10.1_14B72_Restore.ipsw and press Enter.