iOS 9.9.10.0 (build 14A5341a) is an official Apple over-the-air update for the iPhone 6s, released on 2016-08-15T16:45:53Z. The update package is 1.66 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: 6ad5e8b11a56d9d9d1ff411481ed8e953f071bd0.zip.