iOS 9.3 (build 13E233) is an official Apple over-the-air update for the iPhone 5c (GSM), released on 2016-03-21T18:56:19Z. The update package is 1003.55 MB. This is a delta (partial) update that requires 8.1.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 24ef865cef6f58af880d3640aa2dbc942dde6fb2.zip.