iOS 9.3 (build 13E233) is an official Apple over-the-air update for the iPhone 5 (GSM), released on 2016-03-21T18:56:15Z. The update package is 254.97 MB. This is a delta (partial) update that requires 9.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: f31916356087069ed1334c8fbd0f4aa133a541fa.zip.