iOS 12.1.1 (build 16C50) is an official Apple over-the-air update for the iPhone 8 Plus (Global), released on 2018-12-05T18:09:50Z. The update package is 1.51 GB. This is a delta (partial) update that requires 11.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: e1c4d4fb6884444e5e1bb4318908993d74ac90c4.zip.