iOS 11.4 (build 15F79) is an official Apple over-the-air update for the iPhone 7 Plus (GSM), released on 2018-05-29T17:17:13Z. The update package is 861.84 MB. This is a delta (partial) update that requires 11.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: b05c2e986093036c9032b2d601b0d560364f473b.zip.