iPadOS 9.3 (build 13E233) is an official Apple over-the-air update for the iPad 4 (GSM), released on 2016-03-21T18:55:47Z. The update package is 217.89 MB. This is a delta (partial) update that requires 9.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: c32351811f4654ee1087dad582810208c213ffd5.zip.