iOS 11.2 (build 15C5107a) is an official Apple over-the-air update for the iPhone 6s+, released on 2017-11-13T18:04:13Z. The update package is 143.69 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: 211fbf0eb9620e581dab4d41191a943bd8025efb.zip.