iOS 12.1 (build 16B92) is an official Apple over-the-air update for the iPhone X (Global), released on 2018-10-30T17:15:50Z. The update package is 1.54 GB. This is a delta (partial) update that requires 11.3.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 438075096be21332840662ffb7145f40e5f65a77.zip.