iOS 11.4.1 (build 15G77) is an official Apple over-the-air update for the iPhone 8 (GSM), released on 2018-07-09T17:09:22Z. The update package is 323.32 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: 288deed6ea9dca2771e6614904568434c54a61a4.zip.