iOS 10.3 (build 14E277) is an official Apple over-the-air update for the iPhone 5c (GSM), released on 2017-03-27T16:57:48Z. The update package is 513.4 MB. This is a delta (partial) update that requires 10.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 3c8245392c3eb6a03bf96b17f09ef3e919578638.zip.