iOS 11.0.2 (build 15A421) is an official Apple over-the-air update for the iPhone 6s, released on 2017-10-03T17:04:34Z. The update package is 1.1 GB. 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: 115ac13ba9d47d2dd17360c0d18e9f385b91c1d4.zip.