iOS 12.0 (build 16A366) is an official Apple over-the-air update for the iPhone 6, released on 2018-09-12T19:11:12Z. The update package is 1.28 GB. This is a delta (partial) update that requires 11.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 77d4c9b341e0930a79ac4b3e6f62527dfaf2ad60.zip.