iPadOS 8.4 (build 12H143) is an official Apple over-the-air update for the iPad 4 (Global), released on 2015-06-30T15:51:12Z. The update package is 693 MB. This is a delta (partial) update that requires 8.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: f362f5cec11a6522fb3813c7c4e21e1c4c576cfc.zip.