iOS 11.0.2 (build 15A421) is an official Apple over-the-air update for the iPhone 5s (GSM), released on 2017-10-03T17:03:32Z. The update package is 1.02 GB. This is a delta (partial) update that requires 10.3.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 6aa4bdaf3bcd25fbd12dcbf49446f2f420faf742.zip.