iOS 11.4 (build 15F79) is an official Apple over-the-air update for the iPhone 7 Plus (GSM), released on 2018-05-29T17:17:16Z. The update package is 306.33 MB. This is a delta (partial) update that requires 11.3.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 4e5e6a2e746ce43f8e88d8b8dac1cc9e2c941b80.zip.