iOS 12.1.1 (build 16C5043b) is an official Apple over-the-air update for the iPhone XR, released on 2018-11-07T21:09:00Z. The update package is 377.44 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: 53bef6617e2dfb7a95058b8491cb2607d198d584.zip.