iPadOS 9.1 (build 13B143) is an official Apple over-the-air update for the iPad mini 2 (China), released on 2015-10-21T17:15:56Z. The update package is 1.05 GB. This is a delta (partial) update that requires 8.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 809e3d56d80018c396ac2643a80cafda5e9cb2f4.zip.