iOS 9.3 (build 13E5214d) is an official Apple over-the-air update for the iPhone 6s+, released on 2016-02-22T17:47:48Z. The update package is 141.03 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: 542676ec92af3ad6c35c75ae0138dc3350f712aa.zip.