iOS 12.0 (build 16A366) is an official Apple over-the-air update for the iPhone SE, released on 2018-09-12T19:12:14Z. The update package is 1.31 GB. 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: 75d6936e2ad2563441e87891ef266aaccb1e0bf5.zip.