iOS 12.0 (build 16A366) is an official Apple over-the-air update for the iPhone 6s, released on 2018-09-12T19:11:22Z. The update package is 1.38 GB. This is a delta (partial) update that requires 11.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: b71395e3922d69df56f7574a677c1b3a181de675.zip.