This firmware is not signed. This means you cannot restore to it in iTunes.
| Release Date | 26 April 2021 |
| Upload Date | 14 April 2021 |
| File Name | iPhone_4.0_64bit_14.5_18E199_Restore.ipsw |
| File Size | 4.36 GB |
| SHA256sum | 4eda38f1889436adb32a234944785b916163357a4a2c218d99dd398f0188362a |
| MD5sum | e15dc60ca31aaa8298fff281d291c093 |
| SHA1sum | 76a36221880547b243633ee7024ed604c80e79d1 |
| Identifier | iPhone8,4 |
cd ~/Downloads.idevicerestore -e iPhone_4.0_64bit_14.5_18E199_Restore.ipsw and press Enter.