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 311.84 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: c42666995a556794be9e6b7ac852d2c341fed901.zip.