iOS 9.3 (build 13E5181f) is an official Apple over-the-air update for the iPhone 6s+, released on 2016-01-14T18:01:27Z. The update package is 29.46 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: 212df9c621852f244b97292f124ddf1fff910e7a.zip.