iOS 11.4 (build 15F5049c) is an official Apple over-the-air update for the iPhone 8 Plus (GSM), released on 2018-04-16T17:08:12Z. The update package is 277.64 MB. This is a delta (partial) update that requires 11.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 5b003efe7e1163afa471814a18490d534c9550fd.zip.