iOS 9.3 (build 13E233) is an official Apple over-the-air update for the iPhone 5s (Global), released on 2016-03-21T18:56:26Z. The update package is 1.14 GB. This is a delta (partial) update that requires 8.1.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 0fac5cd8a6fa454e1ff7adfc72b41c79cf857b7c.zip.