iOS 12.1.1 (build 16C50) is an official Apple over-the-air update for the iPhone 8 (Global), released on 2018-12-05T18:09:46Z. The update package is 1.44 GB. This is a delta (partial) update that requires 11.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 1b4fcdbfdab5cda4ce9d4c6de640bb5570e6076d.zip.