iOS 9.9.11.1 (build 15B5066f) is an official Apple over-the-air update for the iPhone 6s+, released on 2017-09-27T16:55:49Z. 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: 200a831f089592316d097ee2146b2423856b767e.zip.