iOS 12.1.1 (build 16C5036c) is an official Apple over-the-air update for the iPhone X (GSM), released on 2018-10-31T17:03:57Z. The update package is 370.15 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: 9312c3ba5892b277416684e2ff3d207d08e9d4f8.zip.