✗ This firmware is not signed. This means you cannot restore to it in Finder, the Apple Devices app, iTunes, or idevicerestore.
| Release Date | December 19, 2023 |
|---|---|
| Upload Date | December 16, 2023 |
| Filename | iPhone15,4_17.2.1_21C66_Restore.ipsw |
| Filesize | 7.4 GiB |
| SHA256sum | 9edf3cd85b49d7855dcae45a9ac9811d9d7b8d8839aabd88392d4f955fe74407 |
| MD5sum | 0ad00ece3f7abe0cbcbf9899eca894e8 |
| SHA1sum | 58dc999bef44377984061fff9db90a9a0af1f562 |
| Identifier | iPhone15,4 |
This update provides important bug fixes and is recommended for all users.
For information on the security content of Apple software updates, please visit this website: