iOS 11.4 (build 15F5061d) is an official Apple over-the-air update for the iPhone 7 (Global), released on 2018-05-01T17:06:11Z. The update package is 204.3 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: eb64092613385f58aab28ba25d8c5f5e5d814b81.zip.