iPadOS 9.1 (build 13B5130b) is an official Apple over-the-air update for the iPad 2 (CDMA), released on 2015-09-30T17:58:02Z. The update package is 87 MB. This is a delta (partial) update that requires 9.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: f5485f3bc4bd58e640da8e182f513794b2a12b0d.zip.