iOS 12.0 (build 16A5366a) is an official Apple over-the-air update for the iPhone SE, released on 2018-08-31T17:07:36Z. The update package is 1.21 GB. This is a delta (partial) update that requires 11.4.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 71c4f14b0951a47f0a0ff842c85a931dbb37ca4f.zip.