iOS 11.2 (build 15C114) is an official Apple over-the-air update for the iPhone 6s+, released on 2017-12-02T08:14:31Z. The update package is 1.17 GB. This is a delta (partial) update that requires 10.3.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 2d67c8dc8d569fa15152d9a53bffd9917e127228.zip.