iPadOS 9.3 (build 13E237) is an official Apple over-the-air update for the iPad 4 (GSM), released on 2016-03-28T16:51:13Z. The update package is 964.64 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: f518508ec99cea8f9c03ab7310e32ce40d509bcc.zip.