iOS 10.3 (build 14E5260b) is an official Apple over-the-air update for the iPhone 6s, released on 2017-02-27T17:57:09Z. The update package is 392.68 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: 1e786f3eb0bb3ed78053ebff59ca6c2ca4129db5.zip.