iPadOS 8.4.1 (build 12H321) is an official Apple over-the-air update for the iPad mini (GSM), released on 2015-08-13T18:05:07Z. The update package is 329.08 MB. This is a delta (partial) update that requires 8.1.2 already installed. This update is currently signed by Apple, so it can be applied from Settings › General › Software Update.

Payload file: 91c8471cc14f5116e31bef9f69888d3878ce08ac.zip.