iOS 11.1.2 (build 15B202) is an official Apple over-the-air update for the iPhone 6s, released on 2017-11-16T21:21:48Z. The update package is 235.82 MB. This is a delta (partial) update that requires 11.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 248e21b1beb8dfcf66863d26658749ed83b17acf.zip.