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 252.9 MB. This is a delta (partial) update that requires 9.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: e28fc25e3293d0fa8f238dd9d8155dc4f0c81e60.zip.