iOS 11.4 (build 15F79) is an official Apple over-the-air update for the iPhone SE, released on 2018-05-29T17:16:55Z. The update package is 671.21 MB. This is a delta (partial) update that requires 11.2.6 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 0d15dfbb285cba328ff58a398155c628bb22f941.zip.