iPadOS 9.1 (build 13B137) is an official Apple over-the-air update for the iPad mini 2 (China), released on 2015-10-12T16:56:52Z. The update package is 1.37 GB. This is a delta (partial) update that requires 9.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: c31f744a9044388562bf38952ab22f85157ba5b5.zip.