iOS 11.4.1 (build 15G5072a) is an official Apple over-the-air update for the iPhone 8 Plus (GSM), released on 2018-06-18T17:05:36Z. The update package is 170.9 MB. This is a delta (partial) update that requires 11.4.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: bb716d940ad50a9c710838b75ea82655aaa8794c.zip.