iPadOS 9.1 (build 13B5143) is an official Apple over-the-air update for the iPad 2 (Mid 2012), released on 2015-10-21T17:15:45Z. The update package is 965.49 MB. This is a full OTA update that can be applied from any compatible base version. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 68b06f9dcd1e05221e712c4c9f1211fa5c093113.zip.