iOS 11.4.1 (build 15G77) is an official Apple over-the-air update for the iPhone X (GSM), released on 2018-07-09T17:09:27Z. The update package is 686.8 MB. This is a delta (partial) update that requires 11.2.6 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 3b9667c423617f1ef483788cd984dd368376f6cd.zip.