iOS 11.0.3 (build 15A432) is an official Apple over-the-air update for the iPhone 5s (GSM), released on 2017-10-11T17:06:58Z. The update package is 1.05 GB. This is a delta (partial) update that requires 10.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 5b7eeaaf9fe223eb6ab8caf6fbea67143b83f79a.zip.