iOS 9.9.13.1 (build 17A844) is an official Apple over-the-air update for the iPhone 6s, released on 2019-09-24T17:11:33Z. The update package is 2.63 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: 9636ed2cd23c62958946a97ec20ed8f810a90269.zip.