iOS 9.3 (build 13E5231a) is an official Apple over-the-air update for the iPhone 6+, released on 2016-03-07T17:48:54Z. The update package is 35.74 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: b580780687eee19f69bc1ca871cc02da3905d65d.zip.