Download iOS 17.7 (21H16) 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 Signed

Firmware Identifier iPhone15,4
iOS Version 17.7
Release Date 2024-09-16
Update Date 2024-09-06
Sha1sum
0cc274aeebb1ab47abe410ae491f05f7c8b35450
Sha256sum
9fbba9b890041aba06a2693ecdee5e785022eec5d295d0847bf403d409d6e7e9
md5sum
db97f4a02d4142574d2326298b47b786
Size 7.53 GB
FileName
iPhone15,4_17.7_21H16_Restore.ipsw
Status

Download IPSW (7.53GB) 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/100100

IPSW File Download FAQ