iOS 11.4 (build 15F79) is an official Apple over-the-air update for the iPhone 7 (GSM), released on 2018-05-29T17:17:11Z. The update package is 303.8 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: e6154771688cfda82c62548cc9f1ac9576fdd784.zip.