iOS 12.1.2 (build 16C101) is an official Apple over-the-air update for the iPhone X (Global), released on 2018-12-17T21:06:03Z. The update package is 356.21 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: acc2209976eeaf420268ca340850048fa23305c4.zip.