iOS 9.3 (build 13E5200d) is an official Apple over-the-air update for the iPhone 6s+, released on 2016-02-08T17:48:32Z. The update package is 144.4 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: e8d17118167e6078da695fcc7a21da11d6d8a4f8.zip.