iOS 11.4.1 (build 15G77) is an official Apple over-the-air update for the iPhone 8 (GSM), released on 2018-07-09T17:09:21Z. The update package is 805.05 MB. This is a delta (partial) update that requires 11.1.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 133fb6fa7aa536a16c5c0676e1f8a1a9f7df7203.zip.