iOS 11.0 (build 15A5354b) is an official Apple over-the-air update for the iPhone 5s (GSM), released on 2017-08-14T16:54:30Z. The update package is 213.96 MB. This is a delta (partial) update that requires 11.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: bd5b1b91765b9f52d22ee7407cf199b183f7956e.zip.