iPadOS 9.3 (build 13E6233) is an official Apple over-the-air update for the iPad Pro 12.9-inch (Cellular), released on 2016-03-21T18:55:21Z. The update package is 1.52 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: 044549b71f8124ad93d5168320e42518f2925ee4.zip.