iOS 12.0 (build 16A5327f) is an official Apple over-the-air update for the iPhone 6s, released on 2018-07-17T17:06:15Z. The update package is 394.12 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: 4ab8133130b6e32ceabf0471fa542aaf0b74add4.zip.