iOS 11.0.1 (build 15A402) is an official Apple over-the-air update for the iPhone 6s, released on 2017-09-26T17:08:28Z. The update package is 1.08 GB. 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: 92b7806ad2a8cda878cc030019b42c92847af8ec.zip.