This firmware is not signed. This means you cannot restore to it in iTunes.
| Release Date | 19 February 2018 |
| Upload Date | 16 February 2018 |
| File Name | iPhone_4.0_64bit_11.2.6_15D100_Restore.ipsw |
| File Size | 2.43 GB |
| SHA256sum | 88904a6b534cf4ac35015acfb52a6e880b5437721cb113f82094eef9a698df61 |
| MD5sum | d5914ed99c7e780b91a9bbeb004dea1e |
| SHA1sum | 042248b4b83940fa6af631e21316c07d24b0aa82 |
| Identifier | iPhone6,1 |
cd ~/Downloads.idevicerestore -e iPhone_4.0_64bit_11.2.6_15D100_Restore.ipsw and press Enter.