iOS 12.0 (build 16A366) is an official Apple over-the-air update for the iPhone X (GSM), released on 2018-09-12T19:09:00Z. The update package is 1.55 GB. This is a delta (partial) update that requires 11.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: df18d3a19fdf3037be062e1597647b80b82374f3.zip.