iOS 12.1 (build 16B5084a) is an official Apple over-the-air update for the iPhone 6+, released on 2018-10-15T17:03:29Z. The update package is 460.54 MB. This is a delta (partial) update that requires 12.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: a65bdd4d9751337e8527d0617031626a0f706401.zip.