iOS 12.4 (build 16G5077a) is an official Apple over-the-air update for the iPhone XS, released on 2019-07-16T17:39:33Z. The update package is 344.28 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: a8ccd5a44a53862667113f21422958ca98024efe.zip.