iPadOS 9.9.13.5.5 (build 17G5035d) is an official Apple over-the-air update for the iPad Pro 4 (12.9-inch, Cellular), released on 2020-06-01T18:08:26Z. 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: 4c18bbbe1b4b64d372f29d4353d5dc4e70221940.zip.