iPadOS 8.4 (build 12H4098c) is an official Apple over-the-air update for the iPad mini 3 (Cellular), released on 2015-05-11T17:46:05Z. The update package is 138.5 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: fed0067107ed8bdb1d668312ae1fc9dc202b0617.zip.