Download iOS 11.2.5 (15D60) 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 11.2.5
Release Date 2018-01-23
Update Date 2018-01-18
Sha1sum
2dd3088aab571d5cec22f8d9f84f2077e7b8ba4f
Sha256sum
b0ac4474109617a3622cdb7679b4bf485f97aa86c49319bc1a2815b7521a3be6
md5sum
3bd79d43ecd7575ef6e9a6c1ea9d3db2
Size 2.48 GB
FileName
iPhone_4.7_11.2.5_15D60_Restore.ipsw
Status

Download IPSW (2.48GB) Check device info
Release Notes

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

iOS 11.2.5 includes support for HomePod and introduces the ability for Siri to read the news (US, UK and Australia only). This update also includes bug fixes and improvements.

HomePod support

Siri News

Other improvements and fixes

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

https://support.apple.com/HT201222