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 460.95 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: d7fc16fbd6bcbb630fda50c229c08f86d979e638.zip.