iOS 12.0 (build 16A5357b) is an official Apple over-the-air update for the iPhone 6s+, released on 2018-08-15T17:07:04Z. The update package is 160.22 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: 8cdd512ba624fd334dd49a5dbc5f371404bcb1aa.zip.