iPadOS 9.9.12.3 (build 16F5156a) is an official Apple over-the-air update for the iPad Pro 12.9-inch (Cellular), released on 2019-05-10T17:08:48Z. The update package is 2.18 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: 1a83a0d1dc2c0a8f0bc296902607779beea58ca6.zip.