iOS 12.4 (build 16G5069a) is an official Apple over-the-air update for the iPhone SE, released on 2019-07-09T17:16:30Z. The update package is 285.01 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: c69bc1b016093caaed6f42856016829b5a4ad6b8.zip.