iOS 11.4 (build 15F5061e) is an official Apple over-the-air update for the iPhone X (Global), released on 2018-05-01T17:06:18Z. The update package is 287.21 MB. This is a delta (partial) update that requires 11.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: e2387f496fece631f60a27a92460e5ec70e98ceb.zip.