iOS 12.0 (build 16A5318d) is an official Apple over-the-air update for the iPhone 6s, released on 2018-07-03T17:05:38Z. The update package is 1.13 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: aa6f9731c92e3efce7d32dcdf33a8477fe2a8317.zip.