iOS 12.0 (build 16A5318d) is an official Apple over-the-air update for the iPhone SE, released on 2018-07-03T17:05:41Z. The update package is 1.12 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: 31f3d3f16fd4f37b4ca33c6858a0a7fa6e0076a0.zip.