iPadOS 8.4 (build 12H4125a) is an official Apple over-the-air update for the iPad mini 3 (Cellular), released on 2015-06-09T17:53:04Z. The update package is 159.6 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: c17b109946d615750c0a619a674d307bdec3510b.zip.