iOS 9.3 (build 13E5214d) is an official Apple over-the-air update for the iPhone 6s, released on 2016-02-22T17:47:46Z. The update package is 140.37 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: 34688b2cced05e6a8a86705d25bfb3c2cd5a332f.zip.