iOS 11.4 (build 15F79) is an official Apple over-the-air update for the iPhone 8 (GSM), released on 2018-05-29T17:15:45Z. The update package is 750.94 MB. This is a delta (partial) update that requires 11.2.5 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: c727e9863bb380acc75043cd02e93e49631f0bfb.zip.