iOS 12.1.1 (build 16C50) is an official Apple over-the-air update for the iPhone X (Global), released on 2018-12-05T18:09:54Z. The update package is 1.54 GB. This is a delta (partial) update that requires 11.4.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 073cd11fa8b3416e2ac2752f473f29542d342bc3.zip.