iPadOS 9.1 (build 13B5136) is an official Apple over-the-air update for the iPad Air (Cellular), released on 2015-10-06T17:54:04Z. The update package is 1.37 GB. 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: 968013cf6a488128321c3b89cad16b213507fd98.zip.