iOS 12.1 (build 16B5089b) is an official Apple over-the-air update for the iPhone 6+, released on 2018-10-22T17:02:03Z. The update package is 140.78 MB. This is a delta (partial) update that requires 12.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 1b454c80f67dee0dba74d5763176118f5e99266a.zip.