iOS 11.1.2 (build 15B202) is an official Apple over-the-air update for the iPhone 6s, released on 2017-11-16T21:21:43Z. The update package is 1.16 GB. This is a delta (partial) update that requires 10.1.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 8519aedc1bdda26c7e48e388184e7db42d9edf95.zip.