This firmware is not signed. This means you cannot restore to it in iTunes.
| Release Date | 31 March 2025 |
| Upload Date | 21 March 2025 |
| File Name | iPhone_4.0_64bit_15.8.4_19H390_Restore.ipsw |
| File Size | 4.88 GB |
| SHA256sum | fd314966ec3388527a68bcad56518c0c457956819501ce9aa70f38825078eafb |
| MD5sum | 7d6d9cf5ef570cf2ae33719089442b13 |
| SHA1sum | 40cada7f4ca8e1dd9b7fe80d8f9fb6d7550e4f24 |
| Identifier | iPhone8,4 |
cd ~/Downloads.idevicerestore -e iPhone_4.0_64bit_15.8.4_19H390_Restore.ipsw and press Enter.