iPadOS 9.1 (build 13B143) is an official Apple over-the-air update for the iPad 2 (CDMA), released on 2015-10-21T17:15:48Z. The update package is 766.21 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: 793f73ce5ac55199ac91f104317e43d3644b8bdf.zip.