iOS 11.4 (build 15F79) is an official Apple over-the-air update for the iPhone 5s (Global), released on 2018-05-29T17:16:05Z. The update package is 765.65 MB. This is a delta (partial) update that requires 11.0.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: da1d9455cd65f48af4769394f35943d6b030fd1c.zip.