iPadOS 8.2 (build 12D508) is an official Apple over-the-air update for the iPad mini 3 (WiFi), released on 2015-03-09T18:49:04Z. The update package is 391.78 MB. This is a delta (partial) update that requires 8.1.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: e211129e38910f320b9918994b510600f3c338e4.zip.