iOS 12.4 (build 16G5027i) is an official Apple over-the-air update for the iPhone 5s (Global), released on 2019-05-20T17:07:22Z. The update package is 207.65 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: 90e5e4431f568e86b73f4307f98fea5d67224035.zip.