iOS 11.4.1 (build 15G5054c) is an official Apple over-the-air update for the iPhone 5s (GSM), released on 2018-05-30T17:05:13Z. The update package is 210.22 MB. This is a delta (partial) update that requires 11.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 795ae322159d7e570f88907db6eb757f172f1086.zip.