iOS 11.4 (build 15F79) is an official Apple over-the-air update for the iPhone X (Global), released on 2018-05-29T17:15:41Z. The update package is 688.41 MB. This is a delta (partial) update that requires 11.2.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 3dcc6bd889ba2c15ba7a092fda3ca318352a2573.zip.