iPadOS 13.1 (build 17A5831c) is an official Apple over-the-air update for the iPad Pro 3 (12.9-inch, WiFi, 1TB Model), released on 2019-09-04T17:06:04Z. The update package is 532.07 MB. This is a delta (partial) update that requires 13.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 172977ab1f060382e65d356ac9439904afeec3ad.zip.