iPadOS 9.9.13.5 (build 17F6075) is an official Apple over-the-air update for the iPad Pro 4 (12.9-inch, Cellular), released on 2020-05-18T17:18:41Z. The update package is 3.21 GB. 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: 4b370ced0475d9c72976814a020f96a978311ed8.zip.