Download iOS 17.5.1 (21F90) for iPhone 15 Plus

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 iPhone15,5
iOS Version 17.5.1
Release Date 2024-05-20
Update Date 2024-06-03
Sha1sum
755ca7e6a7571460365fe4740e518288f27fab16
Sha256sum
7ae65fa01f0e5c8b9681d50a78f6859300299714664cd8037c1293cd4441e408
md5sum
30059db904c252373355e9ee6ea0a0d4
Size 7.54 GB
FileName
iPhone15,5_17.5.1_21F90_Restore.ipsw
Status

Download IPSW (7.54GB) 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