iOS 10.3.3 (build 14G5053a) is an official Apple over-the-air update for the iPhone 6s, released on 2017-06-22T17:24:58Z. The update package is 122.8 MB. This is a delta (partial) update that requires 10.3.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 0990068620aee5352bcbad7f80963884fb783af7.zip.