iOS 11.0.2 (build 15A421) is an official Apple over-the-air update for the iPhone 5s (GSM), released on 2017-10-03T17:03:37Z. The update package is 1.02 GB. This is a delta (partial) update that requires 10.3.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 22e9985abbbcfb3a2d2b5da5666736f2eab967aa.zip.