iPadOS 9.1 (build 13B5119e) is an official Apple over-the-air update for the iPad 2 (Mid 2012), released on 2015-09-23T17:55:02Z. The update package is 977.5 MB. This is a delta (partial) update that requires null already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: b09f2a121b90177c088437a6584e1ccb45654e20.zip.