iOS 12.1 (build 16B5077c) is an official Apple over-the-air update for the iPhone 8 Plus (Global), released on 2018-10-09T17:05:40Z. The update package is 583.02 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: 2e8a7575ede7d45a7dad33ff13873ed0726afec5.zip.