iOS 12.4 (build 16G5027i) is an official Apple over-the-air update for the iPhone 5s (GSM), released on 2019-05-20T17:07:21Z. The update package is 51.66 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: 2acbb68b32e80b481aa6a2db9eb339a37acfb2c0.zip.