iOS 11.4 (build 15F5077a) is an official Apple over-the-air update for the iPhone 7 Plus (Global), released on 2018-05-14T17:17:24Z. The update package is 314.55 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: edb7e52b646e3df2812230c94e34d5b8ad727151.zip.