iOS 9.3.1 (build 13E238) is an official Apple over-the-air update for the iPhone 5c (GSM), released on 2016-03-31T16:54:52Z. The update package is 285.88 MB. This is a delta (partial) update that requires 9.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 62f0e64591f43239a34046da5f17623b26d0f4f0.zip.