iPadOS 8.4 (build 12H4086d) is an official Apple over-the-air update for the iPad mini 3 (WiFi), released on 2015-04-27T17:47:05Z. The update package is 146.14 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: a01eded1a3a27a8224432d1dec282a23d6f196de.zip.