iPadOS 9.0.1 (build 13A404) is an official Apple over-the-air update for the iPad 2 (WiFi), released on 2015-09-23T17:55:15Z. The update package is 771.66 MB. This is a delta (partial) update that requires 8.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 6791aa9448698ecb81067b1a71b9a2feade642ec.zip.