iOS 12.0 (build 16A5308e) is an official Apple over-the-air update for the iPhone 6s+, released on 2018-06-19T17:04:57Z. The update package is 1.18 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: b90e967d177c34d7bdc266b6d871baf61da8de68.zip.