iOS 11.4.1 (build 15G77) is an official Apple over-the-air update for the iPhone 8 (Global), released on 2018-07-09T17:09:14Z. The update package is 323.3 MB. This is a delta (partial) update that requires 11.3.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 6bdd4da63abf622b07518ed1c6c6a5a10d8cac70.zip.