iOS 12.1 (build 16B5089b) is an official Apple over-the-air update for the iPhone 8 (Global), released on 2018-10-22T17:01:50Z. The update package is 183.7 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: 22245177aef4a33f4c720e029171755dd20dc912.zip.