iOS 12.0 (build 16A5288q) is an official Apple over-the-air update for the iPhone 8 Plus (GSM), released on 2018-06-05T09:52:25Z. The update package is 1.35 GB. This is a delta (partial) update that requires 11.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: cb1e5d7f9df223d99d367316c40ede96475cead5.zip.