iOS 12.1.2 (build 16C101) is an official Apple over-the-air update for the iPhone X (GSM), released on 2018-12-17T21:06:18Z. The update package is 79.62 MB. This is a delta (partial) update that requires 12.1.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: fdea7f8d6905f22ff42cdc06b4c8e193a7f9c7c5.zip.