Download iOS 17.5.1 (21F90) for iPhone 11

You will have to note that you can only restore signed IPSW firmware files using iTunes or 3utools.

✅ This IPSW firmware is Signed

Firmware Identifier iPhone12,1
iOS Version 17.5.1
Release Date 2024-05-20
Update Date 2024-05-17
Sha1sum
3f5cfa129fd8cd3e18fb4e5787807818c74c90f3
Sha256sum
afe26e85376192a95c82c58f34dd304d552845a40d9ef1b8dfc3b9c8ae262351
md5sum
341f77265246a324ae3781105a3d4639
Size 6.98 GB
FileName
iPhone12,1_17.5.1_21F90_Restore.ipsw
Status

Download IPSW (6.98GB) Check device info
Release Notes

It should be noted that these are the official release notes for the from Apple

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Apple Podcasts

This update includes the following enhancements and bug fixes:

Some features may not be available for all regions or on all Apple devices. For information on the security content of Apple software updates, please visit this website:

https://support.apple.com/kb/HT201222