iOS 11.4 (build 15F5077a) is an official Apple over-the-air update for the iPhone SE, released on 2018-05-14T17:17:21Z. The update package is 249.36 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: b03889a02365e72181d538ad5d3868c09a5bb4e0.zip.