iPadOS 8.2 (build 12D508) is an official Apple over-the-air update for the iPad 4 (WiFi), released on 2015-03-09T18:49:03Z. The update package is 276.92 MB. This is a delta (partial) update that requires 8.1.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 01a06fd3f3b15647b3fb0934f31a6fdd0ec53387.zip.