iOS 11.4.1 (build 15G77) is an official Apple over-the-air update for the iPhone 8 Plus (GSM), released on 2018-07-09T17:09:25Z. The update package is 325.67 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: caff44570cfa953435529ce9c6cc7309edb4096f.zip.