iOS 12.0 (build 16A366) is an official Apple over-the-air update for the iPhone 6, released on 2018-09-12T19:11:07Z. The update package is 1.37 GB. This is a delta (partial) update that requires 11.0.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: bf05e91b24a06a10c9238e9ec208100122bdfbaa.zip.