iOS 9.3 (build 13E234) is an official Apple over-the-air update for the iPhone 6s, released on 2016-03-21T18:56:37Z. The update package is 345.97 MB. This is a delta (partial) update that requires 9.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: d5d015de4d9f2299760b1f1be50056b230ac8d67.zip.