iOS 10.3 (build 14E5230e) is an official Apple over-the-air update for the iPhone 6+, released on 2017-01-24T18:01:51Z. The update package is 689.47 MB. This is a delta (partial) update that requires 10.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 9ed5f542862c18ef822a9c810bbd40f994d95fc0.zip.