iOS 9.9.11.1 (build 15B5078e) is an official Apple over-the-air update for the iPhone 6s+, released on 2017-10-09T17:02:24Z. The update package is 1.96 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: 01bfe5b806576c355a4f3116c52fd75554569544.zip.