iOS 12.1 (build 16B92) is an official Apple over-the-air update for the iPhone 6+, released on 2018-10-30T17:16:43Z. The update package is 1.85 GB. This is a delta (partial) update that requires 10.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 9b22cd2ddb5703ce856229e50f320169dc4b44d8.zip.