iOS 9.3 (build 13E233) is an official Apple over-the-air update for the iPhone 6+, released on 2016-03-21T18:56:29Z. The update package is 343.62 MB. This is a delta (partial) update that requires 9.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 22134bfbd2de3f582f3eed8cb92422dd9c173447.zip.