iOS 11.4.1 (build 15G5054c) is an official Apple over-the-air update for the iPhone X (GSM), released on 2018-05-30T17:05:12Z. The update package is 240.24 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: b39c5d88304ac82753f5c49dbcb0030eaabb6f6e.zip.