Download iOS 16.6.1 (20G81) 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 16.6.1
Release Date 2023-09-07
Update Date 2023-09-02
Sha1sum
8c07caedf386d23d553dbf1dab4e3e90e035f043
Sha256sum
5fdfd0f644625476ad58bb2cdf33d4787ec4dcca794d2a1900d0e5019e28cdcd
md5sum
603b03beb367ca3a5f1738ba0cd8cb3c
Size 6.38 GB
FileName
iPhone14,3_16.6.1_20G81_Restore.ipsw
Status

Download IPSW (6.38GB) Check device info
Release Notes

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

This update provides important security fixes and is recommended for all users.

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

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