iPadOS 9.2.1 (build 13D15) is an official Apple over-the-air update for the iPad Pro 12.9-inch (WiFi), released on 2016-01-19T17:59:39Z. The update package is 1.45 GB. This is a delta (partial) update that requires 9.2.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 12811ecc6a0fa62da4eeb7b4915821ddc957bb6e.zip.