iOS 10.3 (build 14E277) is an official Apple over-the-air update for the iPhone 6, released on 2017-03-27T16:58:10Z. The update package is 581.91 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: cbf8ece3dbaf3a198db3657deef12babfa66877e.zip.