iOS 12.1 (build 16B5068i) is an official Apple over-the-air update for the iPhone X (GSM), released on 2018-10-02T17:12:00Z. The update package is 317.2 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: 8d5744f41ca06e9bc58649dd07f0a68f2a2bb937.zip.