iOS 11.4 (build 15F5079a) is an official Apple over-the-air update for the iPhone 7 (GSM), released on 2018-05-17T17:02:36Z. The update package is 44.22 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: a9133342ca5f85be621b1fb4e2793d4fbb143a79.zip.