iPadOS 9.0.1 (build 13A404) is an official Apple over-the-air update for the iPad 2 (CDMA), released on 2015-09-23T17:55:15Z. The update package is 741.77 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: 54ec2242bb414b7a5bdf4ed178141efcec50ce59.zip.