iOS 9.9.10.3.2 (build 14F89) is an official Apple over-the-air update for the iPhone 6s, released on 2017-05-15T17:02:47Z. The update package is 1.26 GB. This is a delta (partial) update that requires 9.0.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 44b9eb88feafd40a127f9cec7d74c63c7a358b04.zip.