iPadOS 8.4 (build 12H143) is an official Apple over-the-air update for the iPad mini (WiFi), released on 2015-06-30T15:51:08Z. The update package is 834.7 MB. This is a delta (partial) update that requires 7.1.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: abf739d3cc4cb5bd463e0606a7d7395d5129527b.zip.