Download iOS 17.5.1 (21F90) for iPhone XS Max (China)

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 iPhone11,4
iOS Version 17.5.1
Release Date 2024-05-20
Update Date 2024-05-17
Sha1sum
81b4899c48b079b5112f4958ccb8a61f24c789b1
Sha256sum
7d7b7b30551530e4b95d3bdba9ac28e8a39ec1500bfe0674422cbfaabf68eb9e
md5sum
9a099d38f67e68f04a7ae1dd9ab6ce55
Size 7.27 GB
FileName
iPhone11,2,iPhone11,4,iPhone11,6_17.5.1_21F90_Restore.ipsw
Status

Download IPSW (7.27GB) 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