iOS 11.4 (build 15F5079a) is an official Apple over-the-air update for the iPhone 8 Plus (Global), released on 2018-05-17T17:02:20Z. The update package is 325.17 MB. This is a delta (partial) update that requires 11.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 8c280351415c8b677a8d1d95dc421b647e5c3eaa.zip.