iOS 9.3 (build 13E233) is an official Apple over-the-air update for the iPhone 5s (GSM), released on 2016-03-21T18:56:24Z. The update package is 358.8 MB. This is a delta (partial) update that requires 9.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 0d9fc5c3af3b73383e86b0d330843bcdf8f09a6f.zip.