iOS 12.4 (build 16G5027g) is an official Apple over-the-air update for the iPhone XS, released on 2019-05-15T17:05:40Z. The update package is 276.12 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: ee42d406811829c087c3a887594a86d7cc88c467.zip.