Download iOS 12.4.1 (16G102) for iPhone 6s

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 iPhone8,1
iOS Version 12.4.1
Release Date 2019-08-26
Update Date 2019-08-22
Sha1sum
b6477859037d2d401f999160416815e1c0541f31
Sha256sum
3124d7048b50cc7ea4c7500abff53b788303449ead9a93d0d2db367136d4db86
md5sum
a71927383c2e818260afe098ccfd11ee
Size 2.96 GB
FileName
iPhone_4.7_12.4.1_16G102_Restore.ipsw
Status

Download IPSW (2.96GB) Check device info
Release Notes

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

iOS 12.4.1 provides important security and stability updates, 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