iOS 11.4 (build 15F5077a) is an official Apple over-the-air update for the iPhone 7 Plus (GSM), released on 2018-05-14T17:17:26Z. The update package is 313.36 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: 33e86fb9427bb2696c073d8ce7d952c562a3865d.zip.