iOS 12.1 (build 16B5068i) is an official Apple over-the-air update for the iPhone X (GSM), released on 2018-10-02T17:11:59Z. The update package is 562.03 MB. This is a delta (partial) update that requires 12.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: caa3fa5d833636743ea23e18b81eba2fc854bd19.zip.