iOS 11.4 (build 15F5037c) is an official Apple over-the-air update for the iPhone 7 (Global), released on 2018-04-02T17:06:59Z. The update package is 314.03 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: 4d81eda7331202473a41831d4c56cf3a8ab0f55b.zip.