iOS 12.0 (build 16A5365b) is an official Apple over-the-air update for the iPhone 6s+, released on 2018-08-27T17:02:55Z. The update package is 1.26 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: fda9c41fdda05011d049707e88b48adaef4790a7.zip.