iOS 9.9.11.0 (build 15A5372a) is an official Apple over-the-air update for the iPhone 6s, released on 2017-09-06T16:51:08Z. The update package is 1.74 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: 36da2f214aea23f995e605818d7f131b44b9c35e.zip.