iOS 11.4.1 (build 15G77) is an official Apple over-the-air update for the iPhone 5s (GSM), released on 2018-07-09T17:09:33Z. The update package is 248.62 MB. This is a delta (partial) update that requires 11.3.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: a4f7d737cabe3258a7027fa1247009046faedb6a.zip.