iOS 12.1 (build 16B92) is an official Apple over-the-air update for the iPhone X (GSM), released on 2018-10-30T17:16:11Z. The update package is 1.58 GB. This is a delta (partial) update that requires 11.2.5 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: ee918b6192dd60f88763b5591f0d6e03dab8e0e0.zip.