iOS 12.1.1 (build 16C50) is an official Apple over-the-air update for the iPhone XR, released on 2018-12-05T18:10:14Z. The update package is 477.94 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: faa916dfb7ab813fbd0d33a338e082bfa6d94248.zip.