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 1.62 GB. This is a delta (partial) update that requires 11.1.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: de3cfc94211efc43122431276a69a46a63d342a6.zip.