iOS 11.1.2 (build 15B202) is an official Apple over-the-air update for the iPhone X (GSM), released on 2017-11-16T21:20:13Z. The update package is 58.61 MB. This is a delta (partial) update that requires 11.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 64b3e2b025ef676635054da22aab13bfaa30f6dc.zip.