iOS 17.2.1 (21C66) for iPhone 15 Plus

✗ This firmware is not signed. This means you cannot restore to it in Finder, the Apple Devices app, iTunes, or idevicerestore.

Release DateDecember 19, 2023
Upload DateDecember 16, 2023
FilenameiPhone15,5_17.2.1_21C66_Restore.ipsw
Filesize7.4 GiB
SHA256sumd6a4d73b7cc090841c60782fe892041fc26b62294f6b3de6a3af322c5d0085a8
MD5sum85205155a1ac47c54a57c6e5871447a0
SHA1sum32db72eeedcb7dad61d942a8bd64afbd27bc078c
IdentifieriPhone15,5

iOS 17.2.1 Release Notes

Please note, the documentation below is supplied from Apple's update servers. We don't modify the contents of this documentation.

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

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