iOS 12.0 (build 16A366) is an official Apple over-the-air update for the iPhone SE, released on 2018-09-12T19:12:17Z. The update package is 1.27 GB. This is a delta (partial) update that requires 11.3.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 28f0dd364d84067d67a4276c270b73f2595df63f.zip.