iOS 10.3 (build 14E277) is an official Apple over-the-air update for the iPhone 6s, released on 2017-03-27T16:58:17Z. The update package is 757.74 MB. This is a delta (partial) update that requires 10.1.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: a58a8b7bd270279312ceeca12bec66fc9679e0f2.zip.