iOS 9.9.11.1.1 (build 15B150) is an official Apple over-the-air update for the iPhone 6s, released on 2017-11-09T18:10:43Z. The update package is 1.42 GB. This is a delta (partial) update that requires 9.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 19bedcd9df1fcd85afff9d12f50eac4769a18e84.zip.