iOS 12.1.1 (build 16C50) is an official Apple over-the-air update for the iPhone X (GSM), released on 2018-12-05T18:10:11Z. The update package is 355.57 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: c9ebe0da2a672fc07164f14e38ae29cd4df7e589.zip.