iOS 12.4 (build 16G5077a) is an official Apple over-the-air update for the iPhone 5s (GSM), released on 2019-07-16T17:39:35Z. The update package is 284.66 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: a22e9cd21d67a5ee34b80bb5c3612275114d3a7e.zip.