iOS 11.2 (build 15C114) is an official Apple over-the-air update for the iPhone 6s+, released on 2017-12-02T08:14:33Z. The update package is 316.01 MB. This is a delta (partial) update that requires 11.1.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 3b136c1dd093dbca2abdde8d40e8f26d3063b433.zip.