iPadOS 9.9.12.1.1 (build 16C5036c) is an official Apple over-the-air update for the iPad Pro 3 (12.9-inch, Cellular), released on 2018-10-31T17:03:52Z. The update package is 2.6 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: cf52c50f3f355a05f32d52a2e7cacbb4332ac883.zip.