iPadOS 9.0 (build 13A344) is an official Apple over-the-air update for the iPad 4 (GSM), released on 2015-09-16T18:02:10Z. The update package is 1.02 GB. This is a delta (partial) update that requires 8.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 431fcc641f16e88e0b5e4f181f7bc72bff700ff5.zip.