iOS 9.3 (build 13E233) is an official Apple over-the-air update for the iPhone 5 (Global), released on 2016-03-21T18:56:16Z. The update package is 905.21 MB. This is a delta (partial) update that requires 8.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 9e3406ca7661d41ad6784d0bcdf034b9a5424034.zip.