iOS 12.0 (build 16A5318d) is an official Apple over-the-air update for the iPhone 6s, released on 2018-07-03T17:05:39Z. The update package is 448.13 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: 36d77822e9ac5ff37ab125a3a428f57f212826bd.zip.