iOS 10.3 (build 14E5277a) is an official Apple over-the-air update for the iPhone 6, released on 2017-03-16T16:56:37Z. The update package is 420.76 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: 8605c4c8a82c5d120542ca70738b7250ff57a22f.zip.