iOS 11.4 (build 15F79) is an official Apple over-the-air update for the iPhone 7 Plus (GSM), released on 2018-05-29T17:17:15Z. The update package is 750.14 MB. This is a delta (partial) update that requires 11.2.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: d6727975b4b933781f2ea9f2ac7ee8afb6146312.zip.