iOS 12.0 (build 16A5357b) is an official Apple over-the-air update for the iPhone 6, released on 2018-08-15T17:07:01Z. The update package is 158.31 MB. This is a delta (partial) update that requires 12.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 81a86997e9ad18022b5bc3d1579d9b9d022279ae.zip.