iOS 11.2 (build 15C5111a) is an official Apple over-the-air update for the iPhone 6s, released on 2017-11-28T18:00:55Z. The update package is 34.02 MB. This is a delta (partial) update that requires 11.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 08d0f24d1264b8f50168bb8a3b4a4c7daf4f1ab3.zip.