iOS 10.3 (build 14E277) is an official Apple over-the-air update for the iPhone 6s+, released on 2017-03-27T16:58:19Z. The update package is 617.94 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: 0da456b92744a19f90f2423127739c2aa62806a8.zip.