iOS 9.3 (build 13E5191d) is an official Apple over-the-air update for the iPhone 6+, released on 2016-01-25T20:52:47Z. The update package is 127.47 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: 68402f890957462cfae789ac9297436e6c71f5f6.zip.