Download iOS 15.4.1 (19E258) for iPhone 13 Pro Max

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 iPhone14,3
iOS Version 15.4.1
Release Date 2022-03-31
Update Date 2022-03-28
Sha1sum
1ab517e7d775873128c1faf82fffb2a96e51c7dc
Sha256sum
edf7a556bae92bfd3cc2d7e21b0b46178973cc06d2d2475ffbf3f253e74ef677
md5sum
fcd7e4dceb40297ec393b87a5d0e11a8
Size 6.11 GB
FileName
iPhone14,3_15.4.1_19E258_Restore.ipsw
Status

Download IPSW (6.11GB) Check device info
Release Notes

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

This update includes the following bug fixes for your iPhone:

For information on the security content of Apple software updates, please visit this website:

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