iOS 11.2.2 (build 15C202) is an official Apple over-the-air update for the iPhone 6s, released on 2018-01-08T18:18:20Z. The update package is 314.08 MB. This is a delta (partial) update that requires 11.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: fb88fe1cf094fa57ed1bcfb1f2c3a2546738b3f0.zip.