iPadOS 8.4.1 (build 12H321) is an official Apple over-the-air update for the iPad mini 3 (Cellular), released on 2015-08-13T18:05:11Z. The update package is 208.1 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: 1db4f171f45949ec22e338339150157560b6ea0e.zip.