iOS 9.3 (build 13E234) is an official Apple over-the-air update for the iPhone 6s+, released on 2016-03-21T18:56:38Z. The update package is 446.11 MB. This is a delta (partial) update that requires 9.0.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: cdfeb4de8d7b4304d8c207cd987eeb8441f4da62.zip.