iOS 11.4.1 (build 15G77) is an official Apple over-the-air update for the iPhone 8 (GSM), released on 2018-07-09T17:09:20Z. The update package is 855.41 MB. This is a delta (partial) update that requires 11.0.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 4f134be9b09e4bc0c7e6b67cf54483735250baca.zip.