iOS 11.4 (build 15F5071a) is an official Apple over-the-air update for the iPhone SE, released on 2018-05-07T17:11:51Z. The update package is 249.24 MB. This is a delta (partial) update that requires 11.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 0adaa060b10c00c5d3541d411873b12ae5cfe74e.zip.