iPadOS 9.1 (build 13B5119e) is an official Apple over-the-air update for the iPad Pro 12.9-inch (Cellular), released on 2015-09-23T17:55:08Z. The update package is 1.56 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: 2f50d8bbef88b4ccf2c1f9cdaa8c046e7faffec7.zip.