iPadOS 8.4 (build 12H143) is an official Apple over-the-air update for the iPad 3 (WiFi), released on 2015-06-30T15:51:09Z. The update package is 632.45 MB. This is a delta (partial) update that requires 8.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 9f1a8b093f9aefb1fafa09ac794bf62bd55a0856.zip.