iOS 11.4 (build 15F79) is an official Apple over-the-air update for the iPhone 8 (Global), released on 2018-05-29T17:15:38Z. The update package is 750.91 MB. This is a delta (partial) update that requires 11.2.6 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 8593158be3f50578a897ae244773c98a68774c2c.zip.