iOS 12.0 (build 16A5366a) is an official Apple over-the-air update for the iPhone 8 Plus (GSM), released on 2018-08-31T17:07:31Z. The update package is 1.39 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: 30b40ad7759c3224e9b17995b0d1bdf1a3effb67.zip.