iOS 11.4 (build 15F5071a) is an official Apple over-the-air update for the iPhone 7 (Global), released on 2018-05-07T17:11:52Z. The update package is 312.22 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: 5a3d717a4b2cd0df2b7901465c867c84ed118735.zip.