iOS 12.4 (build 16G5038d) is an official Apple over-the-air update for the iPhone 5s (GSM), released on 2019-05-28T17:07:43Z. The update package is 200.22 MB. This is a delta (partial) update that requires 12.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 5dac0b41d4561170f475261e4c79b01c6cbc60e6.zip.