iOS 11.4 (build 15F5079a) is an official Apple over-the-air update for the iPhone 8 (GSM), released on 2018-05-17T17:02:23Z. The update package is 55.64 MB. This is a delta (partial) update that requires 11.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: dabdac94f1efae0bcd553b0a4606956e9d9414f6.zip.