iOS 12.0 (build 16A5366a) is an official Apple over-the-air update for the iPhone 6, released on 2018-08-31T17:07:33Z. 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: 6330bb17dd0c796b63b53115e612b1fbb94fbbf5.zip.