iOS 12.1 (build 16B5089b) is an official Apple over-the-air update for the iPhone 6, released on 2018-10-22T17:02:04Z. The update package is 445.1 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: 5d28f11a885360da7cdf81ba296d65fb0124f6ad.zip.