iPadOS 9.0 (build 13A4325c) is an official Apple over-the-air update for the iPad 4 (GSM), released on 2015-08-06T18:44:15Z. The update package is 395.51 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: 4f2c71f06963c5c19ff0eab7b0154522fd555b3e.zip.