iOS 11.4 (build 15F5079a) is an official Apple over-the-air update for the iPhone 7 (Global), released on 2018-05-17T17:02:33Z. The update package is 312.17 MB. This is a delta (partial) update that requires 11.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 7100fbbee01006cd29e87100195ffa6b027389dd.zip.