iOS 10.3 (build 14E5230e) is an official Apple over-the-air update for the iPhone 5s (GSM), released on 2017-01-24T18:01:49Z. The update package is 668.43 MB. 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: 90d10734da151ae61fe72117af59aa926d0035af.zip.