iOS 10.3 (build 14E5230e) is an official Apple over-the-air update for the iPhone 6s, released on 2017-01-24T18:01:57Z. The update package is 680.59 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: 517cd9deecd419c6c7f915536309e5d686fa4353.zip.