Download iOS 17.4 (21E219) for iPhone 15

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

❌ This IPSW firmware is not being Signed by Apple

Firmware Identifier iPhone15,4
iOS Version 17.4
Release Date 2024-03-05
Update Date 2024-02-28
Sha1sum
ab180a061b571fe45077d25f259e3949193b55c5
Sha256sum
53ce6307c6f280b792375e1d541df13f7ff336bb13398c922775959cf88d4f13
md5sum
bd2d8d3f6dd8591c64cd5e318fd9bc3f
Size 7.48 GB
FileName
iPhone15,4_17.4_21E219_Restore.ipsw
Status

Download IPSW (7.48GB) 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