iOS 9.3 (build 13E237) is an official Apple over-the-air update for the iPhone 5 (GSM), released on 2016-03-28T16:52:26Z. The update package is 282.69 MB. This is a delta (partial) update that requires 9.0.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 639a470797bfbd44e56ad3ddb62a47b9509bf8e4.zip.