Download iOS 13.1.2 (17A860) 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 13.1.2
Release Date 2019-09-30
Update Date 2024-06-03
Sha1sum
a90465c172cd77bcb5bf112993c8ee7caba632d1
Sha256sum
943678018156f358336eefb708ad0522c80f7634328db96fcb6f7f4a00c1e847
md5sum
5c247ad50b0bd470ea976c742bc42240
Size 3.40 GB
FileName
iPhone_4.7_13.1.2_17A860_Restore.ipsw
Status

Download IPSW (3.40GB) Check device info
Release Notes

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

iOS 13.1.2 includes bug fixes and improvements for your iPhone. This update:

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

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