iPadOS 9.9.13.6.1 (build 17G80) is an official Apple over-the-air update for the iPad Pro 4 (12.9-inch, Cellular), released on 2020-08-12T20:32:49Z. The update package is 3.24 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: 7466f9234401bb636018f974339405fb23df7e1e.zip.