This firmware is not signed. This means you cannot restore to it in iTunes.
| Release Date | 08 March 2021 |
| Upload Date | 04 March 2021 |
| File Name | iPhone_4.0_64bit_14.4.1_18D61_Restore.ipsw |
| File Size | 4.27 GB |
| SHA256sum | 99dd516dc6329540b0f11f2269933e9bbbc06b91c073d855038389d7f06e783a |
| MD5sum | f4446733a639e4c9ea8d121075dbc4d0 |
| SHA1sum | 985261bc637fe8ef70dacdd3e519d4b0a836aa1b |
| Identifier | iPhone8,4 |
cd ~/Downloads.idevicerestore -e iPhone_4.0_64bit_14.4.1_18D61_Restore.ipsw and press Enter.