iOS 12.1.1 (build 16C5036c) is an official Apple over-the-air update for the iPhone X (Global), released on 2018-10-31T17:03:55Z. The update package is 370.12 MB. This is a delta (partial) update that requires 12.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: b42876ba673e81ef35f62671834d4f2747848447.zip.