iOS 10.0.1 (build 14A403) is an official Apple over-the-air update for the iPhone 6s, released on 2016-09-13T16:56:22Z. The update package is 1.05 GB. This is a delta (partial) update that requires 9.3.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 75a065482578b5f30b1d474f004f072a832c18ac.zip.