iOS 9.3.1 (build 13E238) is an official Apple over-the-air update for the iPhone 5 (Global), released on 2016-03-31T16:54:42Z. The update package is 1003.14 MB. This is a delta (partial) update that requires 8.0.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 473cf9903fc7fe3e51f3aa97b8f2dbca73c7e9ed.zip.