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 385.79 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: 06793289700916f358ed903fdec0d8f575500ded.zip.