iOS 11.1.2 (build 15B202) is an official Apple over-the-air update for the iPhone 6s+, released on 2017-11-16T21:22:13Z. The update package is 41.25 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: bf0395fd9177b822f8d06257dfaaeec48b98b8c9.zip.