iOS 10.3 (build 14E5260b) is an official Apple over-the-air update for the iPhone 5s (Global), released on 2017-02-27T17:57:04Z. The update package is 380.19 MB. This is a delta (partial) update that requires 10.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 85e4c453affb93a1f36453869b2e5c1e7e85e24b.zip.