iOS 11.4 (build 15F79) is an official Apple over-the-air update for the iPhone 8 (Global), released on 2018-05-29T17:15:37Z. The update package is 754.58 MB. This is a delta (partial) update that requires 11.2.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 8c5eb8834bc7e6ed766f5d30bae69015606b7d5d.zip.