iOS 12.1.1 (build 16C5036c) is an official Apple over-the-air update for the iPhone XR, released on 2018-10-31T17:03:59Z. The update package is 374.08 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: 3ab0ee52387243945157d3fc8624d58c0cf11517.zip.