iOS 11.2.2 (build 15C202) is an official Apple over-the-air update for the iPhone 6s, released on 2018-01-08T18:18:13Z. The update package is 1.12 GB. This is a delta (partial) update that requires 10.3.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 8b27617420ab9ef63b734511d95ac2e6fc6a5705.zip.