iOS 9.9.11.0.1 (build 15A402) is an official Apple over-the-air update for the iPhone 6s, released on 2017-09-26T17:08:25Z. The update package is 1.36 GB. This is a delta (partial) update that requires 9.0.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 4f752240f0c7a4da9cfac2f7ac18fcff59ff1f4f.zip.