iOS 11.4 (build 15F5077a) is an official Apple over-the-air update for the iPhone 8 Plus (Global), released on 2018-05-14T17:17:10Z. The update package is 325.11 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: 2474c8e5c17cf922d787bc1bc0f75b79a1951086.zip.