iOS 9.9.11.1 (build 15B93) is an official Apple over-the-air update for the iPhone 6s+, released on 2017-10-23T17:07:44Z. The update package is 1.55 GB. This is a delta (partial) update that requires 9.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: b36cccf6d761adbf4f51a77a673215be701b017a.zip.