iOS 12.0 (build 16A366) is an official Apple over-the-air update for the iPhone 7 Plus (GSM), released on 2018-09-12T19:13:00Z. The update package is 1.95 GB. This is a delta (partial) update that requires 10.3.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 23018433a741fbd2ff79f66367ffdd9a628c79f4.zip.