iOS 11.4 (build 15F79) is an official Apple over-the-air update for the iPhone X (GSM), released on 2018-05-29T17:15:51Z. The update package is 292.35 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: c1ad31399ccdf7a4238d7cb5d9a3fcf045f62291.zip.