iPadOS 8.4.1 (build 12H321) is an official Apple over-the-air update for the iPad mini 2 (China), released on 2015-08-13T18:05:11Z. The update package is 204.79 MB. 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: f336e086f0a197a4cc59f90ff02af7fb92c968a4.zip.