iOS 9.9.11.0 (build 15A372) is an official Apple over-the-air update for the iPhone 6s, released on 2017-09-12T19:10:22Z. The update package is 1.26 GB. This is a delta (partial) update that requires 9.3.5 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 2d4a7f748a3f3a5c39f318b184fafe8c0c9598cd.zip.