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 214.81 MB. This is a delta (partial) update that requires 11.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: a4e78eea2284c74c413d9102ea45cc554319db69.zip.