iOS 11.4 (build 15F79) is an official Apple over-the-air update for the iPhone 5s (Global), released on 2018-05-29T17:16:06Z. The update package is 674.75 MB. This is a delta (partial) update that requires 11.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 07030814e90a3103df0a5c744b7b02cc0a60b122.zip.