iOS 12.4 (build 16G5069a) is an official Apple over-the-air update for the iPhone XR, released on 2019-07-09T17:16:22Z. The update package is 340.85 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: 91406c07c62ca0e1277fa5ae8e55f726eb656d25.zip.