iOS 12.0 (build 16A5308e) is an official Apple over-the-air update for the iPhone 8 (GSM), released on 2018-06-19T17:04:46Z. The update package is 1.28 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: 61c015913dd8754878f7e7164a8de6b2808ab915.zip.