iOS 9.3.1 (build 13E238) is an official Apple over-the-air update for the iPhone 5 (Global), released on 2016-03-31T16:54:44Z. The update package is 282.63 MB. This is a delta (partial) update that requires 9.0.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: cce079bd82fb4f15b74e15c04dc815a216af1322.zip.