✗ This firmware is not signed. This means you cannot restore to it in iTunes.
Your download should begin shortly. If it does not, you can download it directly here:
Download (7.92 GB)✗ This firmware is not signed. This means you cannot restore to it in iTunes. The instructions below are included for reference only.
iPhone15,2_17.2.1_21C66_Restore.ipsw file that you downloaded.iPhone15,2_17.2.1_21C66_Restore.ipsw file that you downloaded.cd ~/Downloadsidevicerestore -e iPhone15,2_17.2.1_21C66_Restore.ipsw and press enter.cd DownloadsGet-FileHash iPhone15,2_17.2.1_21C66_Restore.ipsw -Algorithm SHA1930153a2febf291464bf457804808789b3311a70. If it doesn't, you may need to redownload the file.cd ~/Downloadsopenssl sha1 iPhone15,2_17.2.1_21C66_Restore.ipsw930153a2febf291464bf457804808789b3311a70. If it doesn't, you may need to redownload the file.cd ~/Downloadsopenssl sha1 iPhone15,2_17.2.1_21C66_Restore.ipsw930153a2febf291464bf457804808789b3311a70. If it doesn't, you may need to redownload the file.| SHA256sum | 567b36bf273186adcc60f2d2bd464f9e2b8f8661e9a6069ae9aefd24fb301a1f | 
                    
|---|---|
| MD5sum | 0aad215e58b473e20b99a45d4f1dfa55 | 
                    
| SHA1sum | 930153a2febf291464bf457804808789b3311a70 | 
                    
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:
https://support.apple.com/kb/HT201222