iPadOS 8.4 (build 12H4098c) is an official Apple over-the-air update for the iPad mini 2 (China), released on 2015-05-11T17:46:05Z. The update package is 135.42 MB. This is a delta (partial) update that requires 8.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: e4d96f2ec7d39829a49a7ce4338ce1abbb973f79.zip.