iOS 12.0 (build 16A366) is an official Apple over-the-air update for the iPhone SE, released on 2018-09-12T19:12:05Z. The update package is 1.7 GB. This is a delta (partial) update that requires 10.3.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: b23fb1782211cb573d8ce5420d8ac23992e4057d.zip.