iOS 10.3 (build 14E5273a) is an official Apple over-the-air update for the iPhone 6s+, released on 2017-03-13T17:02:09Z. The update package is 442.73 MB. This is a delta (partial) update that requires 10.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 7a0c110470156b15c58684f2f4401b38781e37fb.zip.