iOS 12.1.2 (build 16C101) is an official Apple over-the-air update for the iPhone X (Global), released on 2018-12-17T21:06:00Z. The update package is 1.6 GB. This is a delta (partial) update that requires 11.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 31d79fc85f28bfb06e6e0be99c5577d4903209fc.zip.