iOS 11.4 (build 15F79) is an official Apple over-the-air update for the iPhone SE, released on 2018-05-29T17:16:50Z. The update package is 1.31 GB. This is a delta (partial) update that requires 10.3.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 9c37658b0c69b120185a7dbb4745721f75a18195.zip.