iOS 11.4 (build 15F5037c) is an official Apple over-the-air update for the iPhone SE, released on 2018-04-02T17:06:58Z. The update package is 253.52 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: 7ae36bc1b09fceedfe87a33880784c88e58e6060.zip.