iOS 8.3 (build 12F70) is an official Apple over-the-air update for the iPhone 5c (GSM), released on 2015-04-08T17:56:12Z. The update package is 910.77 MB. This is a delta (partial) update that requires 7.1.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: bd3dc1945131ff740ffb656f782c8008a721dc1e.zip.