Download iOS 11.1.2 (15B202) for iPhone 6

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 iPhone7,2
iOS Version 11.1.2
Release Date 2017-11-16
Update Date 2017-11-15
Sha1sum
b7af1c87bb1a5bc325de91cf069fb99b14d34e09
Sha256sum
d558a60f7d84ca19b5e95220fd6f59cc446da4f7628cb56e004777ca8ece1a1d
md5sum
495aaab22999b0368778b5a253454ff3
Size 2.53 GB
FileName
iPhone_4.7_11.1.2_15B202_Restore.ipsw
Status

Download IPSW (2.53GB) Check device info
Release Notes

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

iOS 11.1.2 includes bug fixes for your iPhone and iPad. This update: