iOS 10.3 (build 14E277) is an official Apple over-the-air update for the iPhone 6+, released on 2017-03-27T16:58:05Z. The update package is 616.8 MB. This is a delta (partial) update that requires 10.2.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 7d096c6bd7c4374d366d79ffe2d665fccdac683a.zip.