iOS 12.4 (build 16G5027g) is an official Apple over-the-air update for the iPhone XR, released on 2019-05-15T17:05:41Z. The update package is 273.26 MB. This is a delta (partial) update that requires 12.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 4d984f6a35b7c85f69ff223b2806c0212a487061.zip.