iOS 11.4.1 (build 15G5074a) is an official Apple over-the-air update for the iPhone 8 (Global), released on 2018-06-25T17:06:27Z. The update package is 57.43 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: d8dc08aad2488d2c1c843a3d533913e6332fc01c.zip.