iOS 9.3 (build 13E5234a) is an official Apple over-the-air update for the iPhone 6s, released on 2016-03-14T21:45:54Z. The update package is 65.97 MB. This is a delta (partial) update that requires 9.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 16ff66e8251d2bb21808ea0d494e9bd96ba497f3.zip.