iOS 9.9.13.6.1 (build 17G80) is an official Apple over-the-air update for the iPhone 6s, released on 2020-08-12T20:33:12Z. The update package is 2.76 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: 6a91cf72b696b56c1b89980abef210d0530c1258.zip.