iOS 9.3.1 (build 13E238) is an official Apple over-the-air update for the iPhone 5 (Global), released on 2016-03-31T16:54:43Z. The update package is 904.89 MB. This is a delta (partial) update that requires 8.4.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: fe6d337e8b5fb57a5efcfad7aaaa954b0e9ecc13.zip.