iOS 11.4 (build 15F79) is an official Apple over-the-air update for the iPhone 8 (GSM), released on 2018-05-29T17:15:44Z. The update package is 754.61 MB. This is a delta (partial) update that requires 11.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 2f391bd3bcf56eb45cb02a4856c195a2b5a36f0f.zip.