iOS 9.9.11.1 (build 15B92) is an official Apple over-the-air update for the iPhone 6s, released on 2017-10-20T17:05:37Z. The update package is 1.82 GB. This is a full OTA update that can be applied from any compatible base version. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 73677fff0735326ee29060c9e3f5a7ea7fba3590.zip.