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 306.24 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: 7ce223ad19acc22a07837b300b2edab46b8f90fc.zip.