iOS 9.9.13.1 (build 17A844) is an official Apple over-the-air update for the iPhone 6s+, released on 2019-09-24T17:11:35Z. The update package is 2.79 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: 4e299ffaa58f02585fd56dec9cc3a83b9ec94672.zip.