This firmware is not signed. This means you cannot restore to it in iTunes.
| Release Date | 24 April 2018 |
| Upload Date | 14 April 2018 |
| File Name | iPhone_4.0_64bit_11.3.1_15E302_Restore.ipsw |
| File Size | 2.53 GB |
| SHA256sum | 64b892c580be1509e45e94a64be70e2e46b444b6cd48844dc7146a9af56ddc5a |
| MD5sum | 058d17d6c4486614cd760e76a0b66872 |
| SHA1sum | dd1d1c8ff8afcd1d5f6f4cf30eb3d12a777beb3e |
| Identifier | iPhone8,4 |
cd ~/Downloads.idevicerestore -e iPhone_4.0_64bit_11.3.1_15E302_Restore.ipsw and press Enter.